loved speedrunning as this custom character! basically demolitionist + very high movement speed (4/4 speed plus 100% uptime on sugar). Stealth also lets you avoid aggroing many NPCs, just overall a great experience (so long as you can find loadout-o-matics to restock on sugar!

proof of seed and mutators at 0:08 (at the start of 1-1), custom character info at 0:03 (as I select my character)