Since you don't want to add more baffles, I would use one of the pipes on top, for the intake like you said. I would also use the other top pipe for the diverted water from the pump. I don't know how high the tallest baffle is, but I think the ASM skimmers work best in 8-9" water. I forget. I guess you can try diverting the output back to the baffles. The one thing I do not like about this idea is that, you are going to re-skim some of the water that it already skimmed.
For the smaller top pipes, you can always attach the output of a reactor, ato, or dosing pump for a cleaner look. This is just my opinion. I'm sure others will chime in with different ideas.
For the smaller top pipes, you can always attach the output of a reactor, ato, or dosing pump for a cleaner look. This is just my opinion. I'm sure others will chime in with different ideas.