Reduce the BASE chance of it dropping a exotic by 90% (the chance that it starts at) But make it so the more NON ultras that you kill before killing the ultra will progressively raise this chance (make it so that for ever t1 non-ulta/major kill is worth 1 point, t1 majors are worth two points t2 non-ulta/major kill is worth 2 points, t2 majors are worth 3 t3 non-ulta/major kill is worth 3 points, t3 majors are worth 4. assists (against any tier) are worth 1 point. The exotic particle reaches it utmost BASE chance at 200 points, make that chance 110% of the current drop chance. The way i imagine this working is that longer more time consuming strikes will be far more valuable then ultra boss farming, because the individual coin will be far more powerful after killing a chain of normal enemies, while farming a single ultra could work, it would be far less feasible. [i]Of course this idea would be alot better if i could see the background information on the coin itself, like what it's base chance is, etc, this could using some "mathing "up by someone who is in the know.[/i] Vote