Summoner DPS Rotation

[Infighter]

Obey | RS -> Bio II -> Miasma -> Bio | Fester -> Thunder -> Miasma II | Contagion | Swiftcast -> Shadowflare |(whatever you want here, meh, possibly energy drain if you want to aetherflow earlier) -> Ruin II | Fester-> Ruin II | Rouse -> Ruin II | Spur -> Ruin II | Enkindle.

This is my starting rotation too, yep. No Miasma II because I don't think the little dps increase is worth the bother. Maybe if I'm already near boss or something. Rest is perfect, though.

I would still not toss the ruin 2's in there though, and consider using the rouse, spur, enkindle move WAY sooner

You use Ruin II to trigger GCDs and maximize dps considering off-gcd abilities still have a lock animation. For example, you should always use a Ruin II before using Fester.