Weaknesses in DECORATE monsters

[Dr. Mutagen]

From what I got out of my last topic, it sounds like something similar to this is already being worked on, but I'll post it here just in case.

Basically, what I'm thinking about is this: Allowing for "weakness projectiles" in DECORATE monsters. For example, a monster could shrug off rockets or BFG shots, taking little or no damage in the process, while plasma rifle shots hurt the monster more than any other projectile. If any of you are familiar with the way the battle system in the Megaman series (original and X) works, you'll know what I'm getting at here.

Thanks in advance.