The way you assign location is simpler then I thought. There are some pointer to take along from your strategy miffy on the positioning, but we'll have to adjust it a bit to fit the group's general abilities.
As we're moving in a square patterns in phase 1 and 2 (ping-pong is not for us), then at the start of phase 3 the boss is left on the location where we finished and the first banish group just moves towards the edge of the area. It feels bit more simpler at least to start out that way, with less movement as the DPS and the skill allignement from the boss varies as our DPS varies so that we're not ending the phases at the same time on every pull. And that way not that big fan of placing markers to make people be at the proper places.
I do have to admit that boss might've been too close to the pools, but when DPS focused the add was practically dead before it got out of the pool.
I do think that what could work for us in regards of placement would be something in line of... Keeping the boss on the location where we started phase 3 until the Nether Banish happens, then move the 40ish yards away. Have the hunters be between pool and boss, while rest mainly stacks on boss. When it's time to spread for feedback, people spread between the portal and boss. Possible the banish groups should be ready as well bit before it's happening like being closer to the place where next portal goes.
Wrought placed badly over people/raid/tanks was the issue for few people only, and if I recall they weren't melee.
And if I send 2-3 melee, 1 ranged on top of healer down should give melee more room to spread as well, though as we're doing Tyrant with the same melee heavy setup they are getting the point of being away from boss for few seconds is better then killing people and yourself.
Anyway thank you very much for the ideas
, I think with bit of mix and matching on the tactics what is generally used we have decent chance in getting further into phase 4 and getting the kill, the best I do believe for us was 18% or so, but it healed cause people missed the banish due to lot being dead.