I only state facts =o

Generally speaking you have leeway in what order you do your spells, but you will want to put 4 DoTs and sflare up before anything else, you want RS for your DoTs, and you want to fester twice during RS, and you want to contagion after 4 (5 DoTs if you want to miasma II). Oh and, don't use off GCD abilities during GCDs.

I only stated a rotation that does all of these things.

You can think up whatever you want and as long as it satisfies the criteria above, any other dps difference is negligible.