It's better than it looks..
The reason why there's Radiation instead of Heat is because this also has killing Archons in mind. I figured I'd try to make a build with my Archon [Hek] that can still do the other content too and I came up with this one. I suppose getting a Heat [Hek] would be Ideal but honestly, Radiation is pretty nice considering the status mods. I tried it with [Hunter Munitions] but it doesn't do as well. The Crit Chance just isn't high enough. This can one shot Level 165 Corrupted Eximus Heavy Gunners with (no Frame buffs) (My current highest simulacrum enemy level iw 165).