The system should be consistent, coil just do what the same as other dungeons.
Tome is what the token, that's why tome gear and "raid" gear have same iLV.

I object OP both suggestions as it is customized for specific purpose but ignoring entire system consistency.
I will suggest just make the loot same as i90 loot form ex-dungeons, the player get an item for exchanging the real gear of his desired job.
By this way the loot system will be consistent and, prolly everyone will want to get every drop then. ^^;