Hello!

This is my 1 forma [Hek] build that, with a [Dread], took me to MR 10, when I switched for a [Amprex] and a [Redeemer Prime].
The virus + heat combo is devastating in most situations.
The only mods that arent possible to get solo on low MR are [Toxic Barrage] and [Scattered Justice]. You have 3 options on these:
(1) you can buy from the chat, they arent expensive;
(2) you can invest 1 more forma on the weapon and trade Scattered Justice for Vigilane Armaments and Toxic Barrage for Contagious Spread - in this case, you put a naramon polarity for contagious - and;
(3) you can put a [Contagious Spread] in the place of [Toxic Barrage] and leave the last slot open, waiting for right mods.
The 3 option is the better one if you dont want to invest plat on the mods, because eventually you will get everything needed and the damage difference betwen option 2 and 3 is not that great (15k damage and 12k damage).