OK, time to update.
Thanks to new mods, this flamethrower has gained a new lease of life in my arsenal. Continuous flame make absolute chaff from enemies.
My Ignis Wraith build is not focused on status, it's crit based. And it's because this primary is fast enough to proc. status with almost 70% probability. And yes... it's 7 Forma build! You can drop 2 Forma if you will leave Exilus untouched.
Status combination! Viral here because every subsequent procs add 25% increased damage to health up to 325% in total after 10 stacks and Heat... because it's a god-damn flamethrower! Nah, just kidding. Heat/Viral combined with Saryn's Toxic Lash will give us 3 elemental torch (Heat/Viral/Toxin), which give us a good weapon for every fraction.
Pay attention that this is the whole configuration set.