Haynar redid the dispell mechanics last year to make it where buffs/debuffs have counters. This post collects a couple of explanations of the changes and how the counter vs. dispell system works now.
http://www.project1999.com/forums/sh...25&postcount=4
Taper Enchantment was completely OP in its prior form. A 5 mana guaranteed one slot dispell was insane and had a huge impact on the enchanter BotB.
You will have to cast it up to 8 or 9 times to dispell, where as you used a high level dispell effect it may take just 1 or 2 casts.
Use hide/invis/goblin gazughi ring if you want to break invis on the cheap.