hey im a lvl 52 dest lock, im was very impressed by warlock destruction talents espessially ruin, reaching up to a dmg of 1700 crit with soulfire :D. This changed when i saw a few demonology locks in action. Not only felguard crits often, but less mana is used (dest locks must always carry mana pots with em). What is the best for lvl 60+? Anyone experienced enough pls reply :)

Im destr/demo lvl 54, and I dont mind spending few gold on buying and carrying mana pots , my main focus is  kicking ass, plus i do have a few points in affl, just so i can use mana/life drains , they help a bit, most the times I leave a fight now not having to eat and drink :)