My Compassionate MCs will mostly push for basic self-sacrifice Theurgy techniques to be widely taught amongst the educated members of his population (and the populations of his allies and/or subjects), while allowing his “tried and tested” elite loyalists to learn the more advanced aspects of Theurgy. (so that MC’s “monopoly on the legitimate use of force” is maintained)
MC will also try to restrict his Harrowing towards convicted murderers, rapists, and war criminals (for the most part).
Also, MC will try shutting down as many Wards as reasonably possible (though he does agree with Cerlota that the Erezza-Halassur border ward is super essential, and thus should still be maintained 24/7).
MC is confident that he can maintain good trade relations with the Seracca (thus justifying why the Seracca ward can be shut down), and is likewise confident that he can pacify the Unquiet Dead with a “Hotel Transylvania”-inspired arrangement (thus shutting down the Unquiet Dead’s ward as well).
However, if there’s still an Aether deficiency (to meet the needs of MC’s new world order), then MC will reluctantly allow for a “break in case of emergency” policy of Harrowing infants (like Halassur), while also conducting audits on every province (to make sure that everybody is only spending blood on essential needs (e.g. agriculture, border defense), rather than following Karagon’s footsteps of indulging in a “den of luxuries”).
Hopefully, this is where MC’s low anarchy approach (throughout the past games) pays off: with enough ex-Hegemony officials left alive (and grateful towards MC for being spared and then hired by MC’s faction), hopefully, these audits will be as accurate and efficient as intended.
And taking inspiration from Olynna, any family who loses their infant(s) to MC’s emergency policy will be entitled to one or more of the following (possible) forms of compensation…
1- (Partial) tax amnesty for the next 5-10 years,
2- OR shares of government bonds that pay interest twice a year (and then can later be sold for a profit in the next two to three decades),
3- OR just good old-fashioned supplies (for the family’s immediate housing needs)
(However, if the families choose to respond to MC’s government’s policy with violence (rather than making use of existing policies or negotiating), then all of the above benefits are forfeited, and then the families will spend the next two to three decades in jail.)
So in summary/TLDR: MC will avoid Harrowing innocents to the best of his nation’s ability, optimize/audit blood spending, and then compensate the grieving relatives of the innocent infants that his nation does have to (occasionally) Harrow.
Would love to hear everybody else’s proposed G5 post-Hegemony models of “Harrowing vs. no Harrowing”.
Basically, in a nutshell, Mass Effect = choose-your-own-adventure space opera + third-person shooter + political intrigue + (sort of?) post-apocalyptic thriller + dating simulator.
Considering that Kryptasts monitor the relatives of every Theurge’s respective aristo family (to make sure the Theurgic secret does not leak to people who shouldn’t know), young Ganelon’s access to an “instructions on Theurgy” scroll is indeed a thought-provoking topic.
Aside from the “related to Theurges” angles you already pointed out, perhaps Ganelon himself was already selected (or considered a candidate) to become a Theurge from a very young age?
(and then grew lax/fell behind on his studies (or got kicked out from the Theurgic classroom for some other unspecified reason), which is why we don’t see Gan unleash Theurgy on MC’s rebels during Game 1)
It would especially be quite the achievement for our pacifist MCs to accomplish! 
(though a part of me is still nervous/stressed out on how pacifist MC will survive and make their dreams come true in a world full of greedy, vicious, and/or vengeful opportunists, without ever (eventually) compromising their values 
)
Since Phaedrx was adopted, I’m very curious to find out their “birthplace origin story.” (prior to being adopted by Kleitos)
Is Phaedrx even really a native Karagond, or did Phaedrx simply lose their original name/cultural roots after being forced into the role that Kleitos wanted? (e.g. in the same fashion that the Ottomans enslaved/converted Christian boys into becoming Muslim Janissaries)
If the latter scenario is true, maybe there’s a certain “revenge is a dish best served cold” element to Phaedrx and Kleitos’ relationship? (the one dark trait that Phaedrx struggles to reconcile with their typical inclination towards compassion)
Since openly allying with Phaedrx will cause a large part of MC’s supporters to feel alienated from him, MC will…
1- Put Phaedrx through the G5 motions of being his “political prisoner (to guarantee Karagon’s good behavior)” (aka Gilded Cage house arrest in Grand Shayard),
2- Covertly work with Phaedrx to advance their “biotech agriculture” pet project,
3- And then later leverage his authority/credibility as Eclect (or Inner Voice Prophet) to declare Phaedrx “a repentant soul who has performed enough atonement to be justifiably freed” (thus finally opening the door for Phaedrx to officially re-enter politics as Karagon’s representative on MC’s monarchical koinon)
Aside from outright lying to the Seracca, the one other compromise I can think that allows for the MC to keep both his Seracca alliance and Plektoi army is the following suggestion:
Plektosis should be presented as an experimental last minute option for dying (or terminally ill) soldiers (and requires the soldier’s consent for implementation).
Or is Sereccan hatred towards Plektosis fierce enough to not accept any form of compromise/nuance?
Also, another question: does Plektosis automatically destroy the transformation subject’s mind by default, or is that an extra feature the Hegemony threw in to keep their Plektoi obedient?
If the broken mind is an optional feature, then MC will “sweeten the deal” by keeping as many of his Plektoi as free-willed/coherent as possible.
Do keep in mind though, that if everybody (theoretically) knows Theurgy, then the next question is: “Then how does our government maintain its monopoly on the legitimate use of force?”
As I’ve mentioned above, my current proposed model is to have everybody (in general) learn self-sacrifice Theurgy basics, and then save the more advanced lessons for MC’s government’s “tried and tested” elite loyalists.
Or would you instead prefer to follow @NotMyRealName’s “decentralized tribal confederation” model?
At the time, it felt very easy for MC to express excitement/commitment towards Herne’s dream of an improved/uplifted Sojourn, but after some further consideration, I’m beginning to ponder (and maybe dread?) what sort of favors is Sojourn going to start asking from MC’s faction during later games. 
Hopefully, nothing beyond reason!
@Havenstone Are there any plans to further expand upon Fedrel’s characterization in future games? (Particularly if MC handled Game 1 Winter well enough to avoid triggering his betrayal/death)
Hopefully, there’s a useful Game 2 (or beyond) bonus for us players who went out of our way to keep the band healthy/fed (and avoided killing Fedrel), right?