Something Lolzcoolcat and me came up with that is a very nice way of running ember for endgame players :D I didnt try this build with less than 8k twr damage.

Hint 1: All dst facing the same direction in this stack 1 dst facing the other way(keep it out of the main stack so guardians dont boost it)

Hint 2: Tower booster can stand here, would recommend using the SL skin for more hp

Start with building auras and buff, then swap to apprentice and build during wave (if speed running) 

Also bring tower booster for every wave, this buid wont work without it 

Boss wave: Bring summoner with huntress and apprentice guardians, event ones works best since they boost 1 extra tower. You also need the apprentice builder to get extra dmg on your DST's. Last spot is up to you depending on what you are farming, Im farming an Ember Sceptre so I bring a dps apprentice just to get some extra dmg in on the Phoenix.

Fighting the boss is pretty simple put the summoner on the DST stack and tower boost, might have too shoot it a bit to kill it.

If you want to see a video on this Washboard made one so go check that out if this makes 0 sense lol, gl & hf