Yilx
Sad
Icicle Crash is used ALL the time on the mons that receive STAB and can use it. Unless you were thinking of Avalanche, judging by the second part of your post?And lastly, a note on Technician and Prankster. They're very much the obvious option here and I'd like to just say, sometimes the simplest solution is the best. I fear people want to be overly creative and shun these abilities because they work too well. Please don't do that. There's no shame in using these abilities.
- Icicle Crash and variants could be cool but existing pokemon don't enjoy sitting and waiting to be hit. Combining them with Analytic would be an interesting path to go down.
- There's a bunch of multi-hitting moves that simply by merit of belonging to neither Cloyster or Cinccinno are pretty much never used, like Barrage, Dual Chop and Arm Thrust. That'd be interesting to look at.
- Speed lowering moves, like Bulldoze, Icy Wind, Electroweb and Low Sweep have shown they have potential, but haven't really been explored much outside of Technician Breloom.
- Circle Throw, Dragon Tail's Fighting type variant, also sees little use due to poor distribution.
- Crush Claw, interestingly enough, has ShadowStrike's much coveted 50% chance for a defense drop. We all know how fun that can be
- Lastly, there are moves that take a fairly significant cut in base power for a heightened chance to induce status, like Force Palm. For most pokemon that trade-off doesn't seem worthwhile, could we make it so?
There is a reason why people don't use Dual Chop and co, especially Barrage. Cinc and Cloy use them the best because their damage potential isn't left up to the god of hax to completely rule over and that's after you overlook the imperfect accuracy that these moves bear. (come on barrage is 15 BP per hit lol)
I'd like to address Circle Throw the same way I'd address moves like Quiver Dance; if a mon could use it, it would already have done so. There are hardly any super bulky fighting types in OU that can properly run it, which is why we don't see it. Same way Volcarona is the ONLY mon in OU that runs Quiver Dance; nothing else gets it.
Crush Claw is an interesting option to look at, but like you said, we don't really like leaving things up to luck.