Do it, ranged pally is a lot of fun! And the kind words are appreciated 
I looked at the Tyrant prefix, but stuck with what I have because both my prefixes and suffixes have +attack speed. The guns can surely be improved further over mine if you GDstash double rares (for example, Relentless of Fervor, etc etc) but I did not want to do that. I am also not sure how the Tyrant prefix would allow you to “change devotion path to massive dmg output,” could you please elaborate?
I disagree with Gargabol ring being the better option here. RF points are already hardcapped so we don’t need that, and that is basically the main thing it offers. Combustion band innately offers more %phys damage and also attack speed (not to mention RR), which you don’t get from a Gargabol unless you are very lucky with affixes. 
As for belt, yes you lose the converted flat damage from the chest, but gain +1 to all skills in a class instead. That is huge considering that skill points are scarce for this build.
Hi, thank you for the input! That is certainly an option for a more offensive setup, thank you for sharing it.
Compared to my build however, it has not just lower health but lower DA, armor, and does not take Light of Empyrion which provides damage reduction. All of those things are totally fine if that is your playstyle preference. But as I said I was going for a more overall defensive setup here (and I feel like Light of Empyrion is almost thematically required here, I would be sad to drop it XD).
The increased lifesteal is what I like best about the build you provided, but I wanted to play with the new Dire Bear and I think it actually does the job of Bat fairly well. More lifesteal would always be nice, but actually with Bear I feel like my setup already has enough lifesteal for everything except superbosses, which you normally use pots for anyway.