Start:
5 healers
3 tanks
17 damage dealers
Boss: 5 000 000
0 - 150 (150) sec:
Move Boss to northwest corner, DPS it
Move Clone 1 to southwest corner, DPS it
Move Clone 2 to south corner, tank it and DPS it to ~100k, then DPS Clone 1
Move Clone 3 to north corner, tank it and DPS it to ~100k, then DPS Clone 1 and Boss.
Move Clone 2 from south corner to southwest corner, and tank both it and Clone 1.
Move Clone 3 from south corner to southwest corner, and tank both it and Boss.
Move Clone 4 to the middle of the room, DPS-tank it with someone ranged.
Coordinate DPS to make sure all mobs are at ~20k.
The only hard step here is to make sure nothing dies. Getting everything down to low health is easy, and doesn't need to be typed up (in fact, there is a lot of time for doing nothing). The part AFTER this is the interesting part.
Enrage time at 385 seconds.
From now, Clone 4's DPS tank will DPS PES from range when she's up.
Clone 4 should be glued to them anyway.
PES spawns now.
This is the positioning I use for the fight:
The original boss and the third clone are in the northwest corner, giving each other the aura buff. The same goes for the first and second clone in the southwest corner. They must be kept where they are, as three of them stacking their aura is death.
The blue circle has been put around PES, and, as I mentioned earlier, doesn't show the blue line aura, but rather the radius around PES any other clone will be close enough to affect her. This clutters the picture less and still shows everything.
The fourth clone can be seen in the middle of the room. Her aura doesn't affect anyone and noone else's aura affects her, so she will be standing there, with one DPS on her keeping her aggro'd. The DPS necessary to do that hasn't been included in the calculations below, but thanks to how healing aggro work, this is minor enough that rounding up time numbers should even it out. The health numbers have also been rounded up slightly to keep this simple.
150 - 221 (71) sec:
Tank 1 pick up PES and tank her at the spawn point
DPS PES until she dies
Boss: 1 020 000
Clone 1: 1 020 000
Clone 2: 1 020 000
Clone 3: 1 020 000
Clone 4: 1 020 000
PES: 0
221 - 261 (40) sec:
Kill Clones 2, 3 and 4, and DPS Boss a bunch before PES respawns
Tank 4 move to Boss to do DPS
Boss: 600 000
Clone 1: 1 000 000
PES: 8 000 000
261 - 356 (95) sec:
Kill PES again
Boss: 600 000
Clone 1: 1 000 000
PES: 0
356 - 375 (19) sec:
Kill Boss, then Clone 1
Done, with ten seconds until enrage.