derelictjay
Explorer
I usually roll the HD, when I'm designing an adventure or pre-reading an off-the-shelf one. But in random encounts and such, I usually take the MM value.
dcollins said:If you're not rolling for monster hit points (an expectation of the game), you're giving an additional advantage to the PCs. As discussed in the DMG (under Ch. 3: Variant: Instant Kill) "Since the PCs win most fights, a rule that makes combat more random hurts the PCs more than it hurts their enemies," and of course the reverse is true as well.
Quick example from my game: A player's PC is a fighter with a warhammer and Strength 16 (damage 1d8+3). In a combat with a squad orcs, if I used the average value, then every one of his hits would down an orc out of the fight, automatically. But if hit points vary, then there will be about 50% who could possibly survive a poor hit to make another attack on the fighter.
Another example: In the last game the PCs fought (3E) skeletons. Some had 1 hp, and were destroyed just as if they had 2, or 3, or 4 hit points. But the ones that came up with 12 hp managed to last and fight for as much as 3 rounds.
I feel that using no variation in hit points for squads of grunts gives too much numerical advantage to the PCs.