Your first build looks ok to me.
Are you taking damage through Blast Shield? If so, I would divert some points to Blast Shield.
Try to identify whether you are under the effect of debuffs when you take heavy damage. If you are taking heavy damage while resistance debuffed, you may want to try to overcap your resists a bit more. Elemental resists are especially important, but poison DoTs can be nasty as well.
If you are under a DA debuff, you may be getting crit. Diverting 2 points into BWC and its transmuter should give you enough effective DA for most content.
I would also divert two points into Flashbang and Searing Light. This gives 150 effective OA and 30% fumble, which is really good value. In fact, if you want to maximize OA, I would leave Flame Touched and Presence of Virtue at softcap and cap out Flash Bang instead.
You build looks quite similar to https://forums.crateentertainment.com/t/1-1-6-2-hc-bomberman-returns-fire-grenado-shieldbreaker-vids/86631. The main difference is you go for vitality to fire conversion for additional healing. These builds will always be somewhat squishy. On the flip side, since your main damage skills are cooldown based, you do not have to facetank in order to deal damage. Staying mobile and keeping track of the cooldowns on your healing procs and Blast Shield are the best forms of defense for your build.