what are some ultimate items in this game?

[MaxiDuRaritry]

+5: A weapon that doesn't hit often and hard is useless

Enhancement bonuses above +1 are pointless and almost less than worthless, since well-chosen weapon abilities are vastly superior in all ways, and the additional enhancement bonus points above +1 are actively hindering your ability to gain more +1 equivalents at a reasonable price.

After all, pretty much anyone with any competence and a spellcaster on-hand will have access to greater magic weapon, which doesn't stack with the weapon's enhancement bonus. Anyone who doesn't have a spellcaster on-hand really shouldn't be adventuring. And for groups who don't include T1s or T2s, getting items of greater magic weapon typically isn't too hard. And when that isn't the case? There are STILL better options than increasing the enhancement bonus by a few piddly points.