As long as you've got enough bio media to support your stock, you should be fine. Set up the Jebo and Fluval for mech a bio, run the micron sleeve in the Magnun and your tank should be filtered nicely.
You need to be a little more detailed. I mean if your only keeping five 4" fish then your gonna be better then fine. On the other hand if your gonna jam in 200+ 6-8" fish you'll be seeing tank filtration failure.
Get another FX5 if you can afford it. It will keep your tank pristine. Use both of those for bio with a little mechanical and the micron sleeve in the magnum like already said. Your water will be great!
Alot of african tanks seem to trend towards lots of rock word. With excess decor you need to increase in tank current. This can be done with more filters or a couple well placed powerheads.