You can't move to A6, you only have move 5 because of the mud (unless you run, which gives a chance to slip and fall). Besides which, you get a -5 to Stealth if you move that far. I'll say you move to E9 - it's only 2 squares away so you don't get the penalty. That ok?
Wait - you're prone. You get a -2 penalty to hit, and can only crawl 2 squares anyway. Doesn't change anything, since the 24 still hits with the -2, but I'll say you didn't use Divine Guidance when you had a -2 to hit anyway. (Who knows, Blade may live another turn after all.)
So grabbing the mace and attacking are mutually exclusive actions? If so, he'll attack as previously written (and miss), then hide. Next round, is he able to use Deft Strike to leave cover, move near the mace head, spend a minor action to grab the mace head after attacking, and finally use a move action to sneak back under cover?[/sblock]It's not clear what Tonk wants to do - he expressed interest in both running out for the mace and hiding and pouncing with CA, but I don't think he can do both.