Pretty fun build. Also the only one I've ever seen Pull subsumed for anything other than [Greedy Pull].

Use with your choice of Zenurik or Madurai to [Reach] 100% strength for Kinetic Plating. If you go with Madurai, you could remove [Augur Secrets] and replace it with a mod of your choice.

Use arcane phantasm with [Dispatch Overdrive] for a stupid amount of speed, if you so choose. You won't miss Mach [Rush], much, and the base sprint speed (along with cold thermal sunder spam cast) will be more than enough to keep your meter up. Arcane avenger is here because [Gauss] tends to favour high status, low crit chance weapons.

Keep Redline up at all times. Cast a heat thermal sunder, then cast a cold just behind it. Proc heat on all enemies before you with your primary or (my recommendation) spam fire [Kuva Ogris] [Nightwatch Napalm] on the floor just in front of the heat sunder. Pull enemies toward you. The heat sunder will instantly double the fire proc damage and increase its duration to 21s. Immediately after, the enemies will fly into the cold sunder, have all their armour stripped, then have all 21s of heat proc damage done in one hit.

If this is defense/survival, keep casting Pull to suck enemies into the death trap and take advantage of its 50 meter range. If this is anything else (ie exterminate), just cast more cold sunders as you move around, it's almost the same.
(Optional) before proccing enemies with heat, take advantage of the 0.5s weapon swap time to switch to your secondary primer of choice and ramp up damage status, before swapping back.

Get Emergence Dissipate, even a rank 0 will do. You can simply pull a group of enemies to yourself with Pull, then spam cast/cancel void slings, no Zenurik needed. If you wanna do this more safely, double cast cold sunder to instafreeze enemies. Useful if your energy and/or battery levels are low, and you can't use Kinetic Plating for energy [Regen].