Heyo, this is going to be cleaned up a bit once I figure out some better formatting, but for now , bear with.

Here are the numbers I have come up with for summoner DPS and rotations.

Potency Breakdown

Note, this is a breakdown of damage over 3 minutes, which is the RS CD timer

First, a breakdown of our damage:

In the usual Bio2->miasma->bio1->thunder->sflare opener,

Bio2 ticks 60 times.
Miasma 59 times
Bio1 59 times
Thunder 58 times.
Sflare 57 times.
Miasma2 16 times (only during contagion, and only 10+15 secs, 8 ticks at a time).

With RS and contagion off the bat, bio2 ticks 15 times with RS, miasma 13 times, bio 11 times, thunder 11 times, miasma 2 8 times, sflare not affected.

So now we have,

Bio2 - 15 RS, 45 normal = 35*(15*1.2 + 45) = 2205
Miasma - 13 RS, 46 normal = 35*(13*1.2 + 46) = 2156
Bio - 11 RS, 48 normal = 40*(11*1.2 + 48 ) = 2448
Thunder - 11 RS, 47 normal = 35*(11*1.2 + 47) = 2107
Sflare - 57 ticks = 25*57 = 1425
Miasma 2 - 8 RS, 8 normal = 10*(8*1.2 + 8 ) = 176 (miasma II is terrible and only useful if you want to increase your dps by ~0.2%)

For a total of 10517 potency from DoT ticks.

Now lets look at how many casts we do to upkeep dots.

Bio2 has 30 seconds of uptime per cast, with an additional 30 seconds from 2 contagions, so we need to cast it 5 times. That is a surprisingly low number of GCDs.
Miasma has 24 seconds of uptime, with 30 seconds from 2 contagions, so we cast it 6.25, or 7 times.
Bio has 18 seconds of uptime, so we cast it 8.3 or 9 times.
Thunder also has 18 seconds, so we cast it 9 times.
Sflare has 30 second uptime, so we cast it 6 times.
Miasma 2 we cast twice, during contagion.

So, we spend a total of 32+6*3/2.5 = 39.2, lets round it to 40 (for time spent doing CD's) GCDs upkeeping DoTs.

Miasma, miasma 2, and thunder all have cast potencies, so lets factor that in.

7 casts of Miasma, 1 RS, 6 normal = 20*(1*1.2+6) = 144
9 casts of thunder, 1 RS, 8 normal = 30*(1*1.2 + 8 ) = 276
2 casts of Miasma II, 1 RS, 1 normal = 20*(1*1.2 + 1) = 44 (miasma II sucks!)

So we now have a total of 10981 potency over 40 GCDs, or 274.5 p/GCD from DoTs, which isn't bad!

I am assuming a 2.5 sec gcd. Obviously, as people's spell speed gets higher you will be able to fit more GCDs, making DoTs less effective relatively. This means that I assume at super high haste BLMs will start to overtake SMN regardless.

With a 2.5 sec gcd, we spend 100 seconds upkeeping dots, leaving 80 seconds or 32 GCDs for ruins.

We spend 5 GCDs during RS to setup dots, so we have 7.5 seconds or 3 GCDs for ruins during that time.

Thus, ruins do 80*(3*1.2 + 29) = 2608 damage from ruins.

Lets factor in fester. In 3 minutes we have a maximum of 12 festers, typically closer to 11 because of the delay of first fester, but lets say 12. This is an atypical scenario because we're leading with 3. Because of this, lets assume instead we do 10 festers, splitting the extra fester from opener into 3 "sets" of 3 minutes, assuming a fight is around 9 minutes.

2 festers are done during RS, so festers do 300*(2*1.2 + 8 ) = 3120 damage.

Thus we have our total damage profile of 10981(DoTs) + 2608(Ruins) + 3120(Festers) = 16709 p/3 minutes, or 232 p/GCD or 92.8 pps.

For pet, I'm assuming, based on completely eyeballing the damage, that garuda does a bit less than a ruin's worth of damage every 3 seconds or so. So I'm going to peg that potency at 75.

Assuming rouse and spur stack multiplicatively, you have 1 rouse and 2 rouse/spurs in 3 minutes. During each your pet does 6 attacks. Your pet does 60 attacks total.

so you have 75*(6*1.4 + 12*1.4*1.4 + 42) = 5544

Your pet adds 5544 p/3 min, 77 p/GCD, or 30.8 pps.

Which roughly puts your pet at around 25% of your total dps, which is consistent with most people's findings. Thus a summoner's total pps is ~123.6 pps.

Derived values and Notes

An interesting thing to note, if you completely did NO ruins at all, you would still sit comfortably at 109.1 pps. You lose about 14.5 pps, which is ~12% dps loss from doing no ruin/ruinIIs at all. Food for thought.

Using ruin2 instead of miasma 2 nets you a loss of 44 potency/3 minutes, or 123.38 pps, so you lose .22 pps or about 0.17% dps. So…I'm going to keep refusing to use miasma 2 because it sucks.

The other thing to note is that if your pet dies, immediately resummon. If the target lives longer than ~12 seconds, it is a dps loss.

Another interesting note: without RS, you do a total personal potency of 16150, or a loss of 559 p/3 min, 7.8 p/GCD, or 3.1 pps. This is a personal dps loss of 3.3%, or total dps loss of 2.5%. Thus, its interesting that RS, which is so valued as a DPS cooldown, might not actually affect your dps over its entire cooldown by a significant amount. Obviously, it still impacts your dps within that 20 seconds extremely significantly.

And as to using spur/rouse, if you used them separately, you would lose 2.6% pet dps, or 0.65% total dps. If you did not use spur/rouse at all, you would lose 18.8% pet dps, or 4.7% total dps. This is significant.

Rotation

Opening rotation should be

RS | Obey -> Bio II -> Miasma -> Bio | Fester -> Thunder -> Miasma II | Contagion -> Ruin II | Swiftcast -> Shadowflare | Fester -> Ruin II | Rouse-> Ruin II | Spur -> Ruin II | Enkindle.

The Ruin II's are to get as many RS attacks off as possible.

You should always be in melee range unless there are mechanics that will kill you.

You should never use Miasma II unless you can contagion it.

Because you are in melee unless mechanics dictate, you should always right click the boss when you are using instant abilities (Bio, Ruin II, Swiftcast anything), as your autoattack grants more dps.

You should NEVER use off gcd abilities (Fester, Aetherflow, Rouse, Spur, Swiftcast) on the GCD. Always lead with either a bio or a Ruin II.

Thus, you will drain your mana pretty damn quickly, use Ruin I in your normal rotation to recover some mp. Typically if you have a bard that is also helping sing for the healers, you should have no problem with mana.

Without a bard, this rotation will OOM you in about 2 minutes, with good use of Aetherflow.

If a fight will require you to stay longer than that, and you have a bard, you should drop these abilities from your rotation, in this order.

Miasma II (~0.17% dps loss)
Ruin II (outside of RS) (~2% dps loss)
Ruin (~12% dps loss)
Ruin II (inside RS) (this should never occur).

Miasma II is a slight dps increase at most, and generally not worth it.

If you know going into a fight that it is long and you don't have a bard, do not use Ruin II except under RS.