Monster Summoning VIII Air Elemental is probably one of the best spells in the game right now. He does very little damage and is basically just a 10-minute long trip-fest. I used him in Elite Dust last night despite franctic outcries of "OMG NO PETS!" =P I convinced them to trust me on this one.
It worked great. He didn't kill a single spider and kept ogres and spiders on their backs 90% of the time. He DOES occasionally cast lightning bolt which packs a bit more punch, but he doesn't cast often.
Oh and he trips freakin everything. You know how hard it is to use the actual trip skill on scorpions and spiders? Air-guy has no trouble at all.