My main is a Warlock, so this is absolutely perfect
[...] In regards to the skill leveling, do you know if this will have any weird effects on XP Leveling?
Do you know if this will conflict w/ the multiple summon scripts of Supreme Magicka and LAME?
To answer your question about leveling: No weird effects! As far as the game is concerned, casting one of the summons is treated exactly the same as casting any other spell of that school and level/cost to cast. (Thanks Arkngt and Vagrant0 for help on that.) So, casting one of my summons, say a Summon Clannfear spell, will advance your skill in conjuration and your XP the exact same way casting the normal game version would.
You did remind me however to go back and switch the main Master Summon spell to be a Lesser Power as well. So now the only thing that could have been unbalancing, that you could level conjuration just by casting the main menu over and over again has been resolved, since Lesser Powers by themselves do not level your skill/XP. (Grab v2.15 for that change.)
As for conflicts, I have posted the minor conflict with LAME in the description on TES Nexus and Planet Elder Scrolls (as well as the original post here now).
EDIT: Basically make sure my mod loads after LAME, since it won't make any difference to that mod but might slow down my targeting spell if you load mine first.
Similar type visual/sound-only conflicts are possible with any other magic mod, though not likely. I'll have to grab a version of OBSE to test Supreme Magic since I don't use it in my mods (yet), however I was able to open it in CS and see they did not overwrite that one extra magic effect shader I used, so there should be no conflicts at all with that one.
My mod does not touch any of the game's stock spells.