Great Boss!
Suggestions:
1. Either lower health, remove dmg cap or allow us to cannon.
2. I've found it difficult to find a time where someone isn't already killing it, and unless you have a higher dps you unfortunately don't get any drops. so maybe add another dragon in the dungeon?
Possible drops:
Dragon Hides
New Lava colored whip? or the current colored whips in game. also make these tradeable.
Vissage
Graetoriax head - combine with slayer helm to recollor!
Dragon War Hammer
Increase elite clue drop amount to maybe 2-5? make them somewhat worth doing :P
Thanks!
-Virtics