Originally had [Blaze] instead of [Chilling Grasp].
However this leads to the creation of radiation damage which isn't as useful in the index as magnetic. You do get a high burst damage (241k) from doing so though.
Regardless, with magnetic over radiation, more damage is taken into the enemy's shield, thus destroying it faster.
This is very helpful as all the corpus in the index have shields (that's what corpus do).
The toxin skips the shield completely and deals damage to their health directly.
The [Cleanse Corpus] deals additional 55% damage to them, and this is probably the only use case I leave a faction mod on my weapon.

With 221k burst (firing both barrels into them) they're bound to be dead in the first burst.
You could swap [Chilling Grasp] out for [Chilling Reload] to still get the magnetic effect and a higher sustained DPS. I will play with that more in the future. Didn't see a need for it, as I just wanted a way to kill the flying enemies as fast as possible.