Disgaea blatantly states this in the tutorial of the first game, saying the best strategy in the game is to rush one unit wildly with your soldiers. This is also an effective strategy for distractions, by sending out weak and useless characters, thus the AI auto targets the weakest link, leaving your main fighter several turns of beating the ever living hell out of the enemy.
- Disgaea 3: Absence of Justice makes a reference to this after the first battle of the final chapter. After Mao smothers a Prinny bomb set by the brainwashed Vatos and Champloo helps them resist brainwashing relapse, a squad of brainwashed seniors appears to take down the group. The Vatos get a brief CMOA at this point by calling in their relatives for a diversion - all two hundred thousand of them!
Almaz: Heh... when you can't get good help, get more help...
Sapphire: Indeed. Numbers are power. Human wave tactics of this scale can only be called amazing.
- Disgaea 4: A Promise Unforgotten features this in the God ending. So the party is strong enough to crush half a dozen of God's Parts? How about 8 million of them?