You can set it up using FT3 and Rifle4 and Rifle2. Other kits also help to set it up effectively, like Grenade4. I think the skill is fine not being collision based, but I would like it to explode on impact with the environment instead of instantly becoming “Obstructed”. Mobs to close to the wall? Fail. Fighting on ANY hill? Fail. It really makes using the FT difficult in cramped spaces and on uneven ground. But then again, I would almost always rather use bombs in a cramped space, and Grenades are good virtually everywhere, even under water.