P1+P2+P3+P4!!!
https://cdn.discordapp.com/attachments/180744212554186752/320741529037832192/IMG_0132.PNG
All survived... But I did have Cassian Escape...
Phase 2,3 were both very close. Tactics on 2/3... Wait to drop the door till it necessary to stop the rancor from moving, You should be able to drop the door twice in each phase, Don't drop the door for the second time until Devour cooldown is at 1. With offense down on, you can survive the rancor damage, the idea is to not get eaten. BY waiting for Devour to be at 1 you get an extra rancor move to kill it.
MY GS did seem to call Cassian to assist more then the others... Any of the the other three would be more useful... I do not know what how the game picks an assisting toon. I know RG was always a magnet for assists.
One tactic I used in P4 is when the Rancor's Enrage timer was at 1, I use Escape on Cassian. I did the last 30% of P4 without the Rancor moving with my other 4 toons. This tactic could be used in p2 or p3 if RNG goes bad.
Took a little under an Hour to clear it... but I was watching tv at the same time so I guess it could be done faster.
-Replacing GS with Jyn is an option for Better TM control.
-Will try to record assist rates next Raid...