Reinforced boss drops are created by combining 2 boss drops into one ring that can be +ed.
Example: Flame Diamond + Flame Diamond +Pray of emperor/pray of water temple = flame diamond OR flame diamond (fire)
flame diamond (fire) at +8: 75 all stat 261 attack
flame diamond (fire) at +12: 105 all stat 315 attack
flame diamond (fire) at +18: 163 all stat 447 attack
this system works on flame diamonds, rulers, bez eyes and silvas.
Now playwith had an event called guild dungeon raid where a GM would fill a dungeon with bosses and escort a guild around to kill all the bosses. To join this event your guild leader or commander must register on support and the GM will give you a date/time at which time the GM will summon you and the event will begin. The event is safe from ksers the GM will expell/jail players who attempt to KS you. This event coupled with sales of the fuze stones are all you need to get boss drops to the new players. Aside from that I personally would like to see a summon event for elemental dungeon (stage 15) bosses so players can get the twin aura. Its slightly weaker than the reinforced boss drops but its a good stepping stone accessory.