golden hammers as rare drops from last bosses would be nice... the closer the party average is to the dungeon level, the greater the drop rate.
the "dungeon level" scoring should take into consideration:
1. gear level
1a. every 2 tiers = +1 level
1b. every 4 plusses = +1 level
1c. each level of rarity above white = +0.5
ie...
lvl 55 top purple gear @ t6 +12 = 55 + 1.5 ( t6 = 3 tiers/2 = 1.5 ) + 3 ( +12/4 = 3 ) + 1.5 ( white->green->blue->purple = 3 rarity ) = lvl 61 gear
lvl 55 bottom white @ t3 +1 = 55 + 0 + 0.25 (1/4=0.25)+0 = 55.25
if most of the gear flows between those 2 examples, this person would have ( 61 + 55.25 )/2 = 58.125 gear level
2. class level
2a. primary class = +1 per level
2b. secondary class = +0.5 per level
So a lvl 55/55 would have ( 55 + (55/2))/2 = 41.25 class levels
2c. each set skill enabled = +1
2d. each elite skill earned = +1
so a warrior/druid w/ all 8 elites but 0 set skills would add +8 to the levels making it 49.25 class levels
Taking an average of these 2 things gives us a rough dungeon equivalency of this toon.
( 58.125 + 49.25 ) / 2 = 53.6875
Then we would add up all the toons dungeon equivalencies and divide that # by the max number of players allowed in the instance to find the party's true dungeon equivalency rating.
The DER ( dungeon equivalency rating ) should determine @ what point item shop items drop... last boss standard should be 5%.
Let's say a group of 6 of those guys ran HotO and HotO had a DER of 55, they would fall about 1.3% shy of the DER, so their chances of getting an item shoppe drop from the last boss would be 5%+1.3% = 6.3%. And the game can randomize the item shop item dropped. bind on pickup.
Now, if your group rating is higher, like 60 vs. 55, then you would have -5% + 5% = 0% chance of getting item shoppe items from this dungeon.
So your best best is to go into dungeons w/ higher DERs to challenge yourselves and get better chances @ getting item shop drops.
I know this is long winded, but I just thought of it as a way to not only get megas from last boss, but item shoppe items while not making it too easy to earn them.