Renewal (recover HP at beginning of turn) - To get the full effect of having the camera focus on the characters and showing them gaining HP, I would have to implement status effects that heal.
Conclusion: Doable, but tedious.

Sunlight Hit (recover HP sometimes from attack) - We already have this. Making it have a conditional percent chance is no different than what I did for Adept.
Conclusion: Easy.

Wrath (50% critical boost at 1/2 HP) - I'll interrupt the final critical store and have it execute one last conditional for checking if you have the skill, then if you have 50% HP, and finally, adding 50 to crit.
*Edit*: Final Critical store? Stupid me, that would make wrath activate for all of the character's turns. Not good. No, I will have to interrupt the final READ, not the final write. Stupid stupid stupid...*bashes head*
Conclusion: Without animation (as usual), this will be easy.

Resolve (1/2 HP: 1.5x Str, Skl, Spd) - Effectively the same as Wrath.
Conclusion: Also easy.

Guard (Negate an enemy attack) - We have Big Shield, but we don't have it in FE 7. I really would like to see it in 7...
Conclusion: I have no idea how the no damage/miss stuff works. Could be easy, could be a pain, I just don't know.

Gamble (1/2 accuracy, 2x critical) - This would involve adding a menu option. I don't know if that would be difficult, because Arcane hasn't really tried it, and he's the one messing with menus...he doesn't do anything but mess with RAM, though. Well, I don't know how difficult adding a menu would be, but the rest would be easy. I imagine I would end up using uncompressed text for the menu just to simplify things, so that's taken care of.
Conclusion: ""

Provoke (I think Lords already have this) - Do they? Are you certain that enemy AI is fashioned to have them chase lords? If this can be confirmed, I may be able to look into the enemy targeting routine and discover where the data is that makes them go after Lords, and spread it among other classes in the form of a skill (or characters, if I get around to making scrolls). I suppose it doesn't matter; if there isn't a routine that acts as Provoke, I can still find the targeting routine and mess with it.
Conclusion: Difficult and tedious, but if I have to deal with it, I will.

Paragon (Already know its possible) - This is the exp boost, yes? Yeah, definitely easy.
Conclusion: The hell? I just said "easy". Why do you want me to repeat myself? Why do I want me to repeat myself? What's with this lame "make a comment, make a conclusion" format? I fail.

Blossom (Possible as well) 111% growths at 1/3 exp cost
Conclusion: Gonna be using that sexy new division script

Aether (Tricky, but Sunlight and Moonlight Hit together) - Good god.
Conclusion - Awful