Sunsingers should be able to throw 3-5 OHK fireballs similar to Mario when he gets his fire suit from the Flower. They are the only class with no OHK other than a melee but that means you have to be close to someone. Not far away like a Titan or Hunter. Fusion Grenades do not count because you need to have max discipline and HoPF to be able to throw at least two. Along with pinpoint accuracy. Fireballs would be thrown like the nova bomb. :)