Solo'ed the whole Rancor using Teebo(L) Jyn Rex RG TFP
I understand that the speed values on my TM reducers are not common, but I believe it is possible to solo Rancor using the same squad with mods that not as good.
Also, Phasma would be better than RG, but I don't have Phasma geared yet, which is why I used RG here.