tbm
Where exactly do you have problems, in what 'easy' ubers?
heamn
Arcane Torrent is not viable because:
1) you go full vita build
2) it does not pierce through enemies
Yes, though uhm and melee sorc gameplay may look kinda similar, they use different sources of damage to kill enemies, so you have to roll either Balefire or Miasma proc. Going full energy is tricky, you won't get a significant boost to your damage unless you craft all jewels with 10-15 EF. On the other hand you're losing lots of hp and having this when your char gains 3 hp per 1 stat point into vitality is a total waste.
Don't forget that we are not using any minions and only a few reanimates in Fauzt, Dunc, Unformed Land. In order not to get yourself killed we need two things:
1) a strong spell to deal with fire immunities (Neon Fiends slow you down on hit, if you get slowed and scattered away from enemies you will die) - Miasma greatly reduces enemies' speed and deals lots of poison damage per second as it benefits from your total %SD; Balefire has great AoE and it is capable to one-shot most uberlevel monsters (thanks, Superbeast) if you're using it right (with Hymn).
2) Hymn is very powerful but you need a monster to hit, thus if you are standing still with full hp with all enemies away from you, you will die from their missiles; if you're standing close to a pack of mobs with a little hp, but is capable to hit them, you won't die, as Hymn allows you to gain full hp orb in a second.