Forgive me, but that's a pretty bad rotation you got there.
Its hard to give you advice for this situation. You solely intend on doing T7 as a summoner im guessing? To be honest, respecing your mind for int is pointless. Since you can basically do the same thing on SCH as a Summoner can if your handling Renauds. Simply go Cleric Stance, use Ruin II to pick up a Renaud and Miasma it in place. Keep DoTs up on Boss and Adds, Swift Shadowflares, Ruin I Spam.
If your being forced to go Summoner full time, then you might as well respec for INT then, Get Garuda and finish your class quests.
If not full time just forget the INT respec, I suppose if your still SCH for the other turns.
My personal best DPS opening rotation for single target,
Raging Strikes (Pot after this if you intend to) -> Bio II -> Miasma (Move towards boss as this is finishing cast) -> Bio =>> Rouse (Immediately Rouse before you even see this DoT appear since this is the slowest DoT and your on GCD, also to filler movement to the boss) -> Fester -> Miasma II (Poison Pot after this if you intend on using it) -> Tap Contagion (Pet skill) and Swiftcast at the same time, Contagion First -> Shadow Flare -> Spur -> Ruin 2 -> Enkindle -> Ruin 2 till Fester is back up -> Fester -> Ruin 2 (Raging Strikes falls off) ->
You can also use Rouse later after you cast Shadow Flare like (Shadow Flare-> Rouse -> Ruin II -> Spur -> Ruin II -> Enkindle -> Ruin II or Fester (Fester takes priority if its up, if not Ruin II then Fester) -> Ruin II) - but you have a good chance of missing that last Ruin II before Raging Strikes falls off without enough SS.
I personally use the Rouse after I cast Bio because I feel that delay in between casting Bio and the ailment appearing on the monster, can throw you off sometimes with timing that Fester ASAP. With my way, once the animation is done from Rouse, Bio is already up on the mob so I can just Fester immediately with no timing flaw associated with it.
After that opening, the rest of the fight is keeping up DoTs, trying not to clip them too early and grouping skills together like Contagion + Miasma II, using your off-GCD skills when able during a GCD.
You can do that entire opening rotation before the first Renaud spawns and before the fireballs are sent out for range characters. Past that though, just keep Dots on the adds and your Renaud duties take precedence.