This is a revamp of my original (non-Prime) [Harrow] build, updated for the Prime.

[Harrow] is a shield frame. He has high natural shields, and his abilities benefit from high shields, which is why I have [Redirection], usually a questionable noob mod. Add Pillage onto there, and you can get massive duration on Pennance and almost immediately fill those overshields back up to max. Hell, sometimes I cast Pillage, and while the wave is traveling out, cast Pennance, and by the time I'm done flogging myself, my shields are maxed again. Awesome.

This is a 'selfish [Harrow]' build. Since two of his abilities use Affinity range, there's no point in using [Stretch] etc unless you want to build him for energizing the team more effectively. I'm fine with the base 20m range of Thurible's energy aspect, but if you don't mind sacrificing a little power strength, you can replace [Augur Secrets] with [Stretch]. There's room.

In the past, I've also used [Corrosive Projection], but with the Prime, I'll be putting on some more speed instead, especially since my Steel Path ready weapons can liquify enemies for the most part and I don't really need the -18% armor. But [Corrosive Projection] is also a good option.

And remember, kids: Say NO to Corrupted Mods. They're not as cool as you think they are.