Path 2 times depend on how much you get shafted by specs, though.
My range record was 4:44, it depends wholely on how many times it web shields compared to how many times it cleaves, etc.
Like on Phase 1, if it web shields you can say bye bye to it being 5k hp by the time phase 2 opens, etc (at least with range) - This translates to p3 being longer and thus a longer kill.
I'd say as long as your kills are sub 5 minutes with a scythe then you are doing fine.
Unslain Bosses - Clan
Accidently surged up a dinosaurs ass, became stuck then activated double surge and burst out its chest alien-style!
Got his dragon mattocks then crashed the clan citadel into Anachronia wiping out the dinosaurs.