The new lege weapons have 10AF and 3% melee dmg. They have 3 slots available to imbue.
Is the imbue cap 37.5, or is it lower because you only have 3 slots available?
Still 37.5 but you can get that with 3 slots, so in practical terms whatever you put in those slots will most likely be of lot higher value then if your spreading the points across 4 slots.