Heavy Fusion rifles, more like Sleeper but obviously not as powerful. Alternatively you could call these railguns - maybe those are like heavy snipers and have no charge time. A beam type weapon like the energy weapons on advanced warfare. Also more energy weapons in general, like a plasma rifle or seeker rifle could be inspired from fallen, Vex or Cabal tech PDW'S (SMGS) Grenade launchers Bows and crossbows LMGS (primary version of HMGS, with less damage)

A grappling hook that can cling on to most surfaces and enemies

A flare gun type hand canon that sticks to the target like a Spike grenade dealing a small amount of DOT before exploding! It'd be an Exotic, I'd call it Ravishing Rick!