1) I think 4 is quite enough already
2) Nope, that's a common misconception. If the amount of light you give your corals exceed the saturation point of photosynthesis of the zooxanthellae, the coral will expel the zooxanthellae to lower the amount of byproduct made. This in turn causes bleaching or "melting" of soft corals under excessive light.
3) Well, if there are people who can keep SPS thriving under T5s, I don't see how meeting the lighting requirements of anemones would be a problem
4) It is good to check whether your skimmer is ozone safe first. You wouldn't want it to melt when you inject ozone into it.
5) Keep your nutrients low and magnesium levels constant. Then, seed your reef with some coralline chips.
Try not to use live animals for cycling because it is very inhumane. Just let the prawn rot in your tank. It does more good than bad.