I did some 130er with old Channel Meteor Shower build (legacy Etched Sigil)… 2800+ Paragon, but yeah. It’s obvious that it works. Also did the 130er with Channel Twister (wretched Sigil)… on the other hand I have no useful gear for testing Explosive Blast.
Regarding the Combustion stacks… mhhh, they go down too fast, nearly instantly once you stop channeling. Abusing this with Tal seems to be more logical than playing FB6 because of this. Tal won’t care about the stacks, so it’s easier to handle. The skill juggling is nasty, though.