It's a heavy oriented headshoot build. I played the old version ranger deadeye for with UAH for 1 year and half, this build hit harder then the old one. At the moment we don't have a crit chance perk. When we get one you could try for crit gun.
So the best gun for this build are :
Main gun : Whisper .45 if you don't have one, a Jackal can do the job to, perks dmg/reload/energy or 3 element/headshoot/mist monster dmg.
If you really want to optimise everything go for 3 elemental guns. If you don't want/don't feel the need energy also work.
This gun can one shoot husk, beffy husk need 2 shoot. Usually hit around 120k without team perk. You can kill laser or spectre with 4 bullet.
Aoe gun : your call Zap Zapp or Freedom Herald or tiny instrument of death or Cocoa .45. Zap/Freedom or Tiny are perk with damage, you want them to clear the wave in one heavy burst of death. Cocoa .45 is a special one, you need to go for crit/reaload/energy/crit dmg/crit dmg.
The triforce of huge aoe are really good to clear wave of light target, work also on normal target now with a phase shift to increase their output.
Cocoa .45 need align target, or a way to use the bounce, wall inside a killbox are a good tool for that. Can bounce 10+ times on a 1*1 square. Work really well with a heavy cc trap : flash or freeze up to you. The target will be dead after 2 shoot anyway if you manage to land the 10 bounce on him. Yeah he can kill light target and smasher. Really dangerous gun, be carefull with marshmalow those thing are dangerous! If you manage to box a boss, it also work.
Heavy gun : You need a bald eagle or a duellist or the new mighty Jack's revenge. Perks for bald eagle dmg/reload/energy or 3 elementals + physical/headshoot/mist monster dmg, for duellist headshoot/dmg/physical +3 elementals or energy/headshoot/mist monster dmg. Jack's revenge Dmg/reload/energy/headshoot/headshoot. Bald eagle can be used to one shoot mist monster except smasher. They are a little bit to much for laser or spectre but whatever, go for T4 guns to deal with them. You need 2 or 3 headshoot to kill a smasher. Jack's is way to powerfull for the poor laser/spectre, use it only on the smasher. I need to get my hand on this one, i don't know atm how much he can deal. But i already see a 900k with my physical duellist, with 3+ times the base damage i really want to see how much he can deal xD.
So now you have all the gun you need for this build. Yeah it cost a lot if you really want to optimize everything, but a set of energy gun also work. You need to adapt your gun to your target. But it's really fun and it doesn't burn your ammo and your guns, i play with T4 guns in 4player 100 mission.
Don't forget to use phase shift to get close to high priority target and one shoot them with the 35% damage buff. To be honest it will be usefull only on Smasher.
If you want more mobility you can remove the team perk for more phase shift charge, or remove phase canon, and put a lower cooldown on phase shift. You will only loose six shooter buff when using Jackal or Whisper .45 after round 6. But that shouldn't be an issue.
Have fun.