I casted two chaos bolts that game, 3 rain of fires. First chaos bolt on my screen was 105k with 9 stacks, dark soul, on use, crit proc from an azerite piece, full stacked mastery weapon enchant and skyfury.
The second bolt I casted was on the rogue after the shaman died for 108k on my screen.
So, yes, 3 rains did net a bolt that high, with all the other things I mentioned.