Help with fire/dev build questions

[Masheenz]

I'm uploading my mids reborn build file with the post.  I'm not sure what would be the best sets for the hold powers and what successful builds look like with fire/dev. A whole lot of options with power picks doesn't make it any easier, however I found that the devices were just to slow to use in general combat situations, I really like remote bomb and trip mine but they take far too long to go off etc. I found most of the powers in fire don't fit my playstyle either so I might respec and take leviathan just for knockout blow etc. I'd like to get as blapper as I can with the build while still maintaining my distance from hard hitters. Playstyle tips anything with build is welcome thanks. 

firedevblaster.mxd