OK, here is what I would suggest.
With the gear you have right now, I would suggest going with a blue tree build. I’m assuming you don’t have a red fang, so you can run Dominance as your taunt. As long as you ADS, enemies won’t shoot you and you’ll be able to survive.
You can either use Rakk or gamma burst with this setup. If you use Rakk, use whichever weapons have Action skill end anoints. If you use Gamma, use Gamma anointed weapons, URad, or Consec Hits.
I’d stick with the Old God over Super Soldier. Super soldier is a good shield (some might say too good) but with Dominance you should be able to avoid a lot of damage anyway so the elemental damage of old god will give you more damage when you use that element.
For the class mod, I wouldn’t use Roll Reversal. It is a great COM for Gamma or Fade Away builds, but you really shoud have a grenade with the Action skill active 150% grenade damage anoint to get the best use out of it. Also, Monkey Do has a bug where it converts your gun’s damage to non-ele, and it works like legendary amp shields where it will only apply the etra damage to 1 pellet. That means only 1 of your hellwalker pellets will get the 70% (but actually 86%) damage, AND it will be converted from fire to non-ele.
The Hellwalker and plasma coil are your best weapons at the moment, so build around those. Your main concern right now should be getting more gear so you have more build options. If you have eridium to spare, I’d suggest spending a few thousand with the Eridian Fabricator and see what you get. Otherwise, farm the Slaughters and proving grounds for loot. You can try the takedowns, as Hellwalker and Coil are both powerful enough for Maliwan even without optimized setups, but it may be a bit easier to do the other content instead.
For grenades, your best bet with FL4K will almost always be a Hunter Seeker grenade, followed by Its Piss. HS stacks Furious attack and procs Headcount and LNT, making it an excellent utility grenade. Piss is pretty much parts locked, easy to farm, and gives a 20% debuff to anything hit by it.
For artifacts, use whatever you find that has the best damage passives. To get use out of the Holy Grail you would need for your pet to die frequently, and you don’t want that to happen.
Hope this helps.
