ASM G2 overkill?

[dc4]

Hey guys, I know usually the bigger the better but would a ASM G2 be overkill for a 72g tank with a 20g sump? I am upgrading from a 29g and the 72g is waiting for my r/o water to fill my reserve. Reason I ask is that it takes up about 60% of my sump area and with my pump in there, there is no room for anything else like a fuge. Would I benefit more from the the ASM or would setting up a fuge with chaeto and dsb be better as I want the extra pods for my mandarin (who also eats blood worms) while using a skimmer that does not have such a large surface area.