Pois/Dis counters on tash/slow, and a rune problem
 

K first of all,
I noticed slows still have disease counters on them, and the tashan line still has poison counters on them. I cant remember when this was added in, but i know for certain it was not classic, and im 90% sure it was atleast after velious that this change was added in.

Second of all,
Rune used to absorb spell damage, which in this build it does not because of the specific spell absorbing rune spells from later expansions. (PoP i think started this)
This will affect the Venril Sathir fight, my raid guild in the past used to chain rune the tank who was fighting him, doing this caused a good portion of the lifetap damage to not affect the tank, but the main function was to stop Venril from healing his life back with the lifetap.

Just thought id mention these things, if i think of any other non-classic features i will post them.

I know that the rune problem is being addressed with Kunark release, it was in the spell file update notes iirc.

Tash was always poison counters.