As for the stuck monsters, I see you're doing the chase+thrust trick for smooth movement:
Code: Select all
See:
NARA A 20;
NARA A 0 A_BabyMetal;
NARA AAAAAABBBBBBCCCCCC 1
{
A_Chase();
A_Recoil(-0.4);
}
NARA D 0 A_BabyMetal;
NARA DDDDDDEEEEEEFFFFFF 1
{
A_Chase();
A_Recoil(-0.4);
}
Goto See + 1; Hideous Destructor uses something similar and monsters also get stuck, though I don't remember how I mitigate it besides making all the hitboxes really skinny...
EDIT: Naturally it's awfully complicated-looking and overengineered in principle.
Basically it does this:
0. If its current position is bad, just call A_Wander and skip all the other stuff.
1. Call A_Chase with the monster's usual speed.
2. Check if a valid move resulted thereby.
3. Warp the monster back to its original position.
4. If the chase call had resulted in a valid move, thrust the actor in that direction again, in an amount roughly equivalent to what the A_Chase would do if we assumed certain things about the see state.
Something involving CheckMove should be doable but that just ends up making things *way* more complicated since the A_Chase does your collision/ledge avoidance checks for you.
(And on that note... this method you're using with the really small speeds really increases the risk that a monster gets stuck, because it's only checking the area 0.1 units ahead of it.)
Please let me know of any improvements you make in the process!
Lets give this some extra exposure! 
