DandD said:
Or in other words, the 3.X-Pit Fiend hasn't much more compared to the 4.0-Pit Fiend. Yay.
Not really. The write-ups by Mal are completely skewed. (no offense - but they are)
In one of them, he describes all the wonderful things a 4E Pit Fiend will do when used in a
group of monsters.
In the other, he writes about the 3.5 Pit Fiend as a single monster, and then very... selectively... interprets the effects of the Pit Fiend's spells.
For example, arguing that targeted Greater Dispel Magic is a bad move at higher levels is pretty disingenous. Even if it's a level or two lower than the spells it's cast on, it's often one of
the most effective ways to hurt a heavily buffed character.
Blasphemy? Blasphemy has a 40' radius, so unless you're fighting out of doors, it's very likely to get most of the party, and unless the party level is equal to the caster level, it's absolutely brutal because of the Weaken on top of the Daze.
Unholy Aura works on the Pit Fiend and
all of his allies. Suddenly, whoever else is in that encounter (because we're not assuming that the 4E version gets allies and the 3.5 one doesn't, right?) fighting the PCs gets +4 AC, +4 to saves and high SR.
While in 3.5 Pit Fiends did not have "boss monster, leads other demons" stamped on their stat block, I think it's pretty obvious that's their role - a single Pit Fiend vs. a 20th level party is not a well-designed encounter. (and more than a 4E pit fiend would work well without allies to teleport around)