viral with better heat weight

Chromatic Blade augment on Excalibur Umbra and then make his Emissive give Heat with the color selection
-- removes IPS on the weapon (Excal's "1" provides slash, so viral here also helps with that)

Other builds may want Umbral mods and I try not to forma over them
-- can use lower ranked 60/60 mods to taste in order to forma the exilus mod slot in-game and fit a Tennokai mod in there (not shown on website yet at this time)
--- by lowering the ranks, you dont have to put a Madurai polarity over Volcanic Edge which leaves your build open to another 90% dmg element in other builds

Bane/Smite Mods can be substituted for [Primed Pressure Point] for specialization