Great post. I'd suggest the valentine coming at 3 (unlikely) or 4 CP's. It could be a bad substitute for the AEC, but with current 6 CP requirement, this kind of choice comes way too late.
ANd the 17-pounder really could be 15 popcap, with no other adjustments. It already works as a "less" powerfull Pak43, with the "ignore shotblockers button", which is a bonus feature of the Pak.
