Not going to claim this is the best build out there but it's what I personally came up with and it works for me.
NOTES:
- Yes there is a lot more damage% here than needed, especially since you get some from their 4 if you build ability strength (which you should.) If you want you can use [Rifle Aptitude] or a different arcane. I've tested primary [Frostbite] with the cold wave and it works, it's just really difficult to keep up. Feel free to try it out for yourself. Primary crux can also work, but personally im going for a build where I don't pay attention to weak points.
- No elemental damage is due to personal preference and because you get a lot of heat damage from their 3.
- You can replace [Vigilante Armaments] with a Bane mod if you want. I've mainly been using [Temple] on 1999 missions, and also I'm so tired of switching faction mods so that's just personal preference.
Temple build that I use with her