ok so im gonna upgrade my CL pump

i already have a 1200gph pump hooked up that is an iwaki

i have a 2" intake drilled already so im good on the intake

for outputs i have 2 1 in bulkheads that tee off w/ locline so i have that so far but im thinking about bringing pipe up from the back over the surface of the water and putting some additional outputs up there and putting an oceans motion in to direct the flow at random

however...

the tank is 60x18 and 21 in deep

should i use a dart or bump it up? i have alot of LR and want to be able to move all the water


any other ideas on what i should do ?