I'm sorry but in what world is a 2min burst longer than a potion buff? Most relevant burst windows are 20s due to buff durations, omegaluling multiple Hypercharge windows into a pot window and not refreshing your combo timer sounds like a weird problem to have.

2x Drill, 1x Air Anchor (assuming alignment), Chainsaw and Excavator, Full Metal Field and then a hypercharge from Barrel Stabilizer with Wildfire in tow. That's about 20s, maybe 21s. The only way I can see you have issues with combo timers is if you insist to follow this up with another Hypercharge at virtually no speed.

Can't speak for Dancer.