I do think that thana needs to be reverted back to it's original script tho (Sdef+Hdef)
Currently, the only use for thana is in WOE (in fact most of the time, only against a Pally)
Then again, there is SDEF Orbs that kinda negate thana's effect.
No mob has high vit, and most custom mobs are always with low vit.
Thus, making icepick, PBH and thana effect completely obsolete.
Therefore, i believe that Thana effect ( including icepick and PBH) should be reverted back to it's original script (SDEF+HDEF), or if it isnt possible, then a slight boost.