Try to find a build with good sustain and versatility. If warlock, use a devour build. I used a getaway artist prismatic build for my grind, with Elemental Honing on the Mint Retrograde, it provides a serious punch to the weapon. I paired it with a Vision of Confluence from VoG with Incandescent and Elemental Honing for barrier or Zaouli's Bane for unstop, along with a Boomslang with Jolting Feedback (Overload stunner). Getaway Prismatic is very colorful, so it works extremely well for elemental honing weapons. x4 can be kept up at almost all times through solar primary and double turrets. It kind of trivialized much of the grind for me. Zaouli's bane I run with Demolitionist and explosive payload, so I can reload when I pull a pair of turrets out of my pocket. Agape can slot in here instead of Zaouli, but I havent gotten a decent one yet. But, its important to have some sort of healing in the build, especially as you move up and want to add Brawn (post 400). The Bushido armor set is MUCH better than TechSec, but you get that in Pinnacle, not Solo Ops... so if you arent grinding that solo, you need to add some healing into your build. If Titan, Alpha Lupi is featured. Not sure about hunter, but a heal clip weapon would be ideal at least.