Note that the lvl 75 rings quest gives 2 rings that are not rec-runeable. The fighter and the priest reward was a 3 slotted ring with 32 rec and 32 dex, and a 4 slotted ring with 32 rec and 32 dex.
Also note: What the NPC tells you is one stage ahead on the quest, compared to when you look at what you have to kill after you have picked up the quest. One of the stages of the rings quest tells you to kill Timareu for drops called mage stones (15 of them). The quest mobs are named incorrectly and you should kill the Solis vipers and viper mages in the 3 small rooms just off the biggest room - to get the drops.
Note my map is not correct for 1 room: the upper far right room off the big room contains the Fallen Seal Guardians and Corrupted Seal guardians and not Solis vipers and viper mages. I will go confirm this later.
The Timareu prince at the end of the quest is the main boss on lvl 2 - he hangs out near the throne area in the boss room.