You may call expansion + monkey grip effective, but I have seen it in action, and it can become quite ludicrous.
Seen it in action? I've used it.
In particular, I used it with a Githzerai Monk/PsyWar who, by virtue of his increased size, became the only melee specialist in the party who could tag a dragon who was intent on staying out of reach. The other warriors' ranged attacks were more a nuisance than a threat.
Were it not for him, the dragon would have been free to strafe the party at will, with either his breath weapon or large boulders. Not to mention his spells.
The spellcasters did the majority of the damage, to be sure, but the big column of meat meant that the dragon couldn't easily retaliate. Equipped with a Bisento (an Oriental Adventures/Rokugan polearm), the Pole Fighter feat (DCv1, identical to PHB2's Pole Master) that made that polearm into a monk weapon, and the Combat Reflexes/Hold the Line/Stand Still/Deft Opportunist feat tree, the Githzerai ensured the dragon couldn't move freely around the party and take out the Wizard.
Which, BTW, was essentially the same experience I had at a Dallas ENWorld gameday using a Monk/Fighter/Kensai with Enlarge Person potions. The difference was that there were 2 dragons, and the other warrior in the party was a Knight with no ranged weapons.
That aside, when you compare it to some of the other things a PsyWar can do, its no big wonder that many gamers on these boards consider the class a one-trick pony. Nothing else even comes close.
But as I pointed out, you can do nearly the same thing without psionics...its just more convoluted.
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