I have to say, out of my western RPGs, the evil blue and green gelatin (from Baldur's Gate: Dark Alliance II) is the worst enemy ever. They line up and the minute they see you coming, they will just start COVERING you in GOBS of nasty gelatinous goop that will apparently knock you right the fuck out. So, the only strategy I've been able to come up with is to buff my armor if possible, run in, beat up one until I'm about half dead, then hide behind a wall and heal. Sometimes, one of them will ooze up to me, and I can pick it up that way. Otherwise, it's a game of hit-and-run with jello.