Just offering my opinions on some of the units I have that you have but some others here don't:

Sophie: as some have said, downright massive stats and a fantastic lich lightning rod but takes a lot of leveling, and skill raising to become a reliable blocker due to only blocking during skill. Angels are a timed blocker (a "gatekeeper" if you will) where you let certain enemies that should be burned down by ranged dps pass and then activate skill to wreck trash, if you know liches are incoming make sure to drop her last to give her target priority. Without skill leveling she is a lightning rod and a "one and done" blocker

Marr: GOD I LOVE HER lol she is a godsend for the dailies since all but Toast to Men have poison and she cuts that by half (75% after AW), heals 2 units at a time (3 after AW) and all units in range during skill (which buffs her attack AND range), plus AW gives her MORE range which also benefits from range boost during skill. You also have Iris and Camilla for single target healing and since you have Mehlis and Garania I'd honestly drop Marius down in the priority tier. He's a hybrid mage/healer and you've gotten potent units for both. Yeah he hits hard and has massive range after AW but unless certain maps are tight on what units you can bring (like you can't spare room for an extra healer AND an extra mage) I think he can wait for later. Mehlis during skill matches his range, Garania nukes half the map during skill (wish I had her lol)

Aisha: She takes a ton of investment since she really shines only after AW though if you get her skill level up she'll destroy just post-CC. Smashing 5 enemies at once with a huge boost to attack and a moderate range boost is pretty damn deadly, especially with that fairly low cost.

Zola: Physical mage that turns magical during skill. She's great against enemies that have MR to reduce your mages' damage, like the flying eyes in Crystal Keeper (Thursday daily) but I've found she gets wrecked by mobs in CK X without lots of heal support, mainly due to being a Gold. I haven't AW her yet though so maybe after I do and level her that issue will be gone.

Conclusion: I mostly agree with Sora's priority list, except I'd honestly drop Marius down a rank or two due to the presence of Iris, Camilla and Marr for healing and Mehlis and Garania for nuking. He is certainly a powerhouse in his own right, though Trust is much harder to raise than Affection seeing as you get a few free presents a month, the rest come from the Wednesday daily.