You cannot compare solar grenades to void grenades. You cannot compare two grenades from armour to two grenades that require you to use one subclass (which happens to be the support class and least useful for solo play and DPS). Your argument that locks have to raid (and get lucky) when the titan example was sold by Xur reenforces my point that locks are disadvantaged. Dude, titans get great gear in the raid too. The classes are balanced apart from armour. Therefore, I take solar grenades into account.