Will not use unless the stone limitation is removed. Atronach stone or Lord stones are required as far as I am concerned for Master difficulty.
Conjuration levels hella super mad fast if you use Soul Trap much. The raise dead spells in-combat will rocket it fast too. It's the Atronach spells that level Conj ultra slowly. I personally wish Twin Souls was near the bottom of the tree instead of at the end. Seems wierd the end talent is prettymuch only good for summoning 2 dremora lords, since you'll never summon anything else at 100 skill since the atronachs have static levels (dremora lords are 42, even potent storm atronachs are like 35 I think and potent fire atronachs are 12 or 13... big whoopdy doo, the atronachs all svck with their 25 damage fire/lightningbolts of slowness). Would be at least more entertaining to dual wield zombies/elementals for more time in your career than at the very end.
Illusion is slow to level if you actually use it naturally, but levels mad fast if you spam Courage on npcs in town or Calm. However, I'd say that Illusion at all ranks below 100 is pretty crap, because of the low level caps on the spells and because they do not work on undead/automatons until the 100 point talent.. and more than half this game is undead. If I was changing perks I'd make the "works on everything" perk be somewhere low in the tree instead of at the top. The top talent should be a level cap increase, like the perks below it in the tree. Just something so your stuff doesn't all cap out at level 35 or lower ( and 35 only for the annoying Master spells at that)
You should leave enchanting alone. Like Illusion it is mostly only good at all when you have it at 100 skill. Until then you grind worthless, 10%-the-use-of-random-quest-junk gear with inferior soul gems since they don't drown you in Grands until you're pushing 40. Trades being easy to level in Skyrim makes up their for their dullness.
And anyone who thinks they gimped their character by getting to 100 smithing super early clearly isn't putting their sword on the grindstone or something.