I've been dabbling around with 4x DHs a bit. Only my main is really geared well but I've found a interesting setup with them. Main is like 725-750 para and alts around 350-450 something. Quite bored of the season already though

2x normal UE builds using fire ballistics with cycled wolf pet
1x UE build using the knockback multishot, this skill is crazy at knocking stuff away from you! A bit unsure how it will play out but some things are so much easier to clear with it. This guy is also using the boar pet right now for the extra def stats
1x UE build using the cold multshot for more crit as well having calamity + dawn instead of yang for the mark as well also using the contagion mark. Think I'm also using the numbing traps passive on this guy.

For gems I'm using trapped and zei on the 3 first guys, esoteric on the main and toxins for damage buff + reduction on all others. The last guy is using iceblink + gogok for more crit and a bit more cooldown to get some extra discipline due to having no yangs with RCR for the vaults atm.

I did a 70 or something at 10 minutes the first try but my main is at like 1,8 mil sheet while the others are running 0,5-0,7 mil dps. So ye it can get a lot faster, will see if I can be arsed continuing now that overwatch is playable =P