We tried her for the first time tonight, decided to not use the soaker way because if Blizzard is consistant at all they will remove the debuff cap. We seem to do absolutely fine until the 3rd set of adds (Shes been 32-35% at this point) at which point the WOTAs all manage to gang up on one person and then instagib them and jump as 4 to another person. We seem to be totally fine until theres 4 WOTAs though.... we were also unflasked and largely unpotted and healer heavy (8).
Summary
Group A:
-Players with fewer than X stacks* of the "increased Arcane damage taken" component of the WotA debuff
-Players with the DoT component of the WotA, regardless of # of stacks. This takes precedence over the previous rule.
Group B:
-Players with X stacks or more* of the "increased Arcane damage taken" component of the WotA debuff, but not the DoT component.
* X is equal to the # of WotA's floating around in your raid group, divided by 2, rounded up. Specifically:
# of WotA DoTs floating in your raid // 'X'
0 // 0
1 // 1
2 // 1
3 // 2
4 // 2
5 // 3
6 // 3
Gonna try this suggestion next time from earlier in the thread

.
We do not have our Group B outrange the arcane missiles, they seem to live fine with one stack, I dunno what to do with two stacks though. 20k in 3 seconds is prolly too much to outheal so occasionally someones gonna bite the bullet.
We also keep the melees in as their own group, if for some reason one of them gets the dot they move to group a then back onto Solarian. Melee dps is amazing in this fight, we CoR her and let the rogues go to town.
My biggest beef with this fight is definitely getting multiple dots on one person. Its a chain reaction of death since once one person has 2+ it remains that way since both jump to the same next person.