Fleshrending with 3/5 enrage build or none, its still have %3hit. And Aldriana gives only %0.4 crit with all raid buffs/flasks/feasts. And Atkpower is lesser from Fleshrending, its giving 165atkpower via stats but Armored for Teeth (Atkpower for armor.) makes Fleshrending gives more AP. Its around 80AP difference in favor with Fleshrending and 0.4crit+ with Aldriana.
For t10 hands, its only with use of 5/5 enrage but its not a waste as you state. Its just a spice out of table, you dont rely on it but not skipping it aswell.
PS: Just cause EJ states something, people are worshipping. Im not stating if Aldriana is bad or not, I just state Fleshrending is better. If you going to worship EJ and get hit/haste legs for your HPala I wont discuss anymore, hope you got my point.