Using Caesar Maya I have completed 9 bases, with 3 more about 90% done.
6 x nobles (spear) - Bd(S) @ 5 ap = 30
1 x middle rank (spear) - Bd(S) @ 5 ap = 5
1 x middle rank (sling) - Sh(O) @ 3 ap = 3
1 x peasant (spear) - Bd(O) @ 3 = 3
2 x peasant (sling) - Sh(O) @ 3 = 6
1 x peasant skirmishers (sling) - Sk @ 2 = 2
Even if I could use them all together (which I can't) that's only 49 ap in total.
So where do I go from here? The middle rankers can, obviously, be promoted (or demoted) at need and a few Aztec nobles can be co-opted. This still leaves a big shortfall. Looks like I'm hitting the books again and giving my bank card a pounding.