I can't offer expert help, as I need help with this build myself. My Fire/Fire brute is only to lvl 27 right now, but I've been going through various builds and combinations in MVD and think you have to do both to be able to take damage. Here is my thought process...
Looking at the stats, at lvl 50 with 3 SO Dam Reduc/Def in Fire Shield, Temp Protection and Plasma Shield, you get 0% on defense, 35.1% resist to smash, lethal, energy and negative, 90% to fire, 23.4 to cold, nil for Psi and Tox. So I will be getting hit a lot but resisting 1/3 of the damage. IMO, I will need better damage mitigation.
Throw in Combat Jumping, Tough and Weave w/3 SOs and now you're at 8.8% Def, 52.7% Resist to Smash/Lethal, and pretty much immune to Fire. This is much better, but you still need Healing Flames and Consume to keep going battle to battle and keep your fury up, and in my build I'm leaning towards adding Aid Self as well. With RotP, perhaps dying can become part of my AoE attack plans, albeit a bit kamikaze.
Regarding offensive attacks, this is trickier. I want the PBAoE attacks as that's the main reason I chose Fire/Fire. BA is a decent staple when slotted with dmg, Burn is cheap and does good dmg but needs recharges as 25 seconds is too long to be effective as your primary AoE attack, & FSC does good dmg but is very expensive @ 18.51 end so it needs a lot of end reduc. When I respec I'm dropping BoF as it is a narrow cone and rarely hits multiple targets and is too expensive unless hitting multiple people. This gives you 3 PBAoE attacks, and with both BU and FE, they have the potential to do good dmg to ancillary mobs.
This leaves you with Scorch, FS, Cremate, Incinerate and GFS as the 5 single target attack options. I'm not sure about chain DPS calculation and thus which of those 5 to take, and would love some advice, as this build has left me with no room for powers. Taking Combat Jumping, Tough, Weave and Aid Self alone took 6 powers, with RotP I took all 9 secondary powers, and still want room for Hasten, SS -or- SJ, and the Epic powers...
I'm working on a fire melee/fire armor build for farming tickets. What would be the best way to go for this Brute build Defense or Recharge? If Defense what kind? I don't think there's a lot of IO's that give a good set bonus for fire defense? Well just looking for a little help with this build i guess. Thx for any help guys.