I just took a look through some of Proxima's work in Wicked, and made a few improvements:
Wicked 15: I've eliminated the blocker, and bashers are down to just the one needed to break the initial splat fall in time. Crowd control can be done with builders alone by making a holding cell to the right of the entrance platform. So that level is down to
1 floater, 7 builders, 1 basher, and 1 miner.Wicked 10: Floaters and blockers are down to one apiece. Builders and diggers remain unchanged, so the result is now
1 floater, 1 blocker, 10 builders, and 1 digger.Wicked 11: I found lots of improvements here, and they're all variants of the same general idea:
The first lemming builds up to the platform to the right of the entrance (this can be reached with one builder) while the crowd is held back with a digger and a builder (another builder is used later to release them). The leader walks across the platform and drops by the lizard, past his trigger area. He can then get through the tree using two miners. Once you're past the tree, the rest of the path to the exit can be cleared with just 3 builders and 2 bashers.
In total, the above solution uses 6 builders, 2 bashers, 2 miners, and 1 digger. However, further improvements are possible by using variations of this route:
1) One of the bashers can be replaced with a miner+builder. This gets bashers down to 1.
2) The second miner at the tree can be replaced with a builder. This gets miners down to 1.
3) Instead of a digger and two builders, crowd control can be done with two blockers, two miners, and two builders. Combined with #2 (which saves a miner), this eliminates the digger.
4)Crowd control can also be done with digger, a miner, a blocker and a builder. This gets builders down to 5.
With these improvements, the result is down to
5 builders, 1 basher, and 1 miner.Edit: Added the floater to Wicked 15.