Summoner Rotations

[Remn]

I do agree that blind not really effective on a lot Endgame boss, so far Garuda EX when tanking Her and sister is always a good idea to blind b4 they WW or down burst. ( i dodge a few what way.)
on Single target. You do not flash for Emity, you flash for blind. (unless you want initial snap aggro form newly spawn add otherwise you spam RoH combo).
Flash for Emity only a good idea when AoE tanking and snap aggro on newly spawn add.

[givemeraptors]

Another good thing to keep in mind is that it's generally worth saving Spur for (Rouse + Spur + Enkindle) but Rouse can pretty much be used anytime it's off cooldown and you can squeeze it between GCD. If you know the fight well and the ~time it takes to get through certain phases etc. then feel free to use Spur whenever you think it's appropriate.

If you're on a PS3 you may want to macro Miasma II and Contagion together. Bio II-->Miasma-->Bio-->run up and use Macro Miasma II + Contagion. Switching between your normal hotbars and pet hotbars on a PS3 is really...awkward and can probably eff up your timing. This makes it a bit simpler, keeps Contagion from being macro'd to a commonly used ability and still allows you access to it if you don't use Miasma II (normal hotbar access).

[Madoka]

A thing about Bombast's post, Ruin 2 is not your exclusive filler move. Ruin is. Use Ruin 2 when you need to use an off GCD ability like fester or spur or something. Try and fit those in during the GCD from Bio and swiftcasting shadowflare as well. And make sure Garuda is on Obey.

Being a good SMN takes a lot of effort in learning how to play the class the best.