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I got no dukes. reg
Shamans are a bit harder, especially in groups. If you have any spells, prep the lowest one and wait for them to cast. Usually their first cast is dispel with a couple acid bolts or a warding spell. I think they cast boil only when they start realizing they can't hit you any other way. 
If you get hit by an ewave, wait until their next attack round before standing up. If they prep a spell, get up immediatly. Otherwise wait for them to swing their staffs at you, then stand up and knock them around.
Wormlings are easy as long as you're not encumbered. Just time your swings with their RT and hack them to pieces. Or not, charge has a horrible DF anyway. I could dodge their burrows pretty well, but the ones I didn't hurt. There's a particular room in the tunnels that's burrow-proof, at least it was when I was last there. It's the intersection between 4 different paths.
Overall I'd say try to avoid getting in a swarm if at all possible. If a shaman or wormling knocks you down and you get boiled/burrowed again, you're pretty much done for. reg