I Played Acid summy for 4 years and switched to engi because he wasnt strong at any time. He had a nice Burst for bosses since the lvl 55 patch...
However if u compare the Patchnotes Acid got a 10% dmg buff compared to Vamp (not mentioning the phlebotomy-nerf).
But maybe the old Hybrid builds could make sense again. This would be much higher dmg-increase because u benefit of the Acid Bolt- and Vampirism-buff
I made a Build using all important rubies but i've no idea if its viable.
http://en.allodswiki.ru/calc/#!4!333...3…QEGQB!qszff/UDB
As u see theres no defensiv skills exept the 2nd life but it maximizes Damage. Anyway it uses a lot of Rubies so its questionsable if the following rubies ar needed.
Dark Gift (for Mana)
Call of the Grave (depends on Blood management)
Withering Touch (Mana-Management)
Desecration (Mana-Management)
Summoning Mastery (idk if the pet is immun to all the aoes in Astral)