If you use damage resistance instead of self revive, radiance is much more useful. Also, unless you are using the sun breaker gauntlets and know how to use solar grenades effectively, you should definitely be using the fire bolt grenades. They are pretty lethal with radiance active and if you use it right, you'll get to throw like 6. Couple that with flame shield and grenades igniting enemies and you can wreak havoc on the whole enemy team