In the true square spirit, it is easier to defeat malboros after you already have killed some of them. (to get malboro tentacles for the GF doomtrain)

So what you do is take your mugger and magic user and give them Cerberus, who has ST Def x4. ST def= Berserk, Confuse, Silence, and one other. You'd want to use either Slow/Stop/Haste (to prevent slow), or Bio (to prevent poison damage) Or, you could use Pain magic and that would help a lot also~ Give this person the GF Pandemona also, and then use triple magic on Speed (or slow or stop or haste) and if you have them learned, auto haste, initiative, and spd+40% (I don't think pandemona or cerberus have ablx3 so but you need Diablos to have Mug, so junction him in too)

Then, go in, Mug the sucker, then run away