This is based on the paladin/monk ap that people have posted but wasn't ready for review yet so may change....

Humans take 22 ap to get 30% amp (or 12/2 ap for 20%/10% amp respectively).
Half-elves take 24 ap to get 1.2x1.2 = 44% amp (9 ap for 21%).
Paladins take 42 ap to get 30% amp (22/12 ap for 20%/10%).
Shintao monks take 40 ap to get 30% amp (30/20/10/5/1 ap for each 5% less).

A half-elf with 5 paladin levels can get 1.44x1.3 = 87.2% amp for 66 ap.
A human with 5 paladin and 6 monk levels can get 1.3x1.3x1.15 = 94.35% amp for 74 ap.
A human with 4 paladin and 12 monk levels can get 1.3x1.2x1.2 = 87.2% amp for 54 ap.

A human with 4 paladin levels and 18 monk levels would work ap wise but does not have enough levels.
A human with 3 paladin levels and 20 monk levels would work ap wise but does not have enough levels.

Just thought people might be interested in the numbers.