They're all good and depend on what you're trying to do, heavy sabre is also a good choice for this challenge albeit it makes the bucket section harder. (heavy and officer) handaxe is very strong for dps with easier/more practical headshots than heavy and even regular sabre, 207 damage on a bugle-buffed handaxe headshot. Sabre is super flexible and if you dont know what to choose, probably better than both. i don't like heavy sabre, but other players like kev are great at it
1. kevviz has already done trio copenhagen 2. trio is less of a challenge + paifu prob isnt interested 3. paifu is a busy dude always cooking something up 4. what about 0:23
7:12 only possible with rifle and also the HAP and musket just arent as useful for this. carbine, pistol, maybe (still 7:12), but the stats of HAP and musket do not lend themself to this challenge