The second issue I find is that Divine Casters cannot Counterspell a Mords, correct?Rangers and Paladins are not included because of their limited spell lists. If there is enough public desire to add them it is possible.
The third issue I find is that, against mobs/bosses, the use of Counterspelling is essentially metagaming what the Player knows a particular mob/boss will do.
For example, if I take my caster to fight the Balor in Nashkel Mines, I'll cue up Counterspelling as I engage the Balor, so that my toon can survive the fight—and hopefully the Balor doesn't spam dispels.
So, in Counterspelling mechanics, does a Dispel counter a Dispel, automatically if in memory? Because then, for low CL builds, there would be a rather simply strategy to employ EVERY TIME when facing dispel casting mobs!!