Dusclops as an attacker isn't all that impractical imo - one of the things I find most difficult when running Trick Room is a way to handle Dragons (especially Salamence who has Intimidate), so Ice Beam on Dusclops isn't that bad an idea. However, beyond that... Dusclops should just stick at statusing stuff and annoying the crap out of high HP mons with Pain Split.