Here's an idea for Taxing 2, that (I hope
) forces a solution by building over the water:
Save 72 of 80 (you can save a couple more)
3 minutes (though 2 is enough)
RR 70 (as before)
5 bombers, 5 blockers, 10 builders
Also, for Fun 22, there was a very neat challenge someone (LemSteven?) posted in a challenge thread once, which could work for a Mayhem+ difficulty repeat. I'd have to find it to be sure about the difficulty though, it might be too hard for what we're trying to achieve.
EDIT: found it
I posted this one a couple months ago on the old forums, but I'm going to post it again here for the benefit of some of the newer members:
Fun 22 -- Save 100% using the following skills:
1 Climber
2 Builders
2 Bashers
1 Miner
1 Digger
Yeah, probably too hard for Mayhem even, and backroute-ish too since you bash under most of the level. A better idea might be to encourage a route through the top of the level, by giving plenty of builders and blockers, and no terrain-removal skills except for a few bashers.