Can I suggest more edits to Coliseum...
* Remove potion of invulnerability.
* Fix potion of accuracy to be as original... +5 to hit (according to my s3 notes).
* Reinstate original potion of destruction at +3 dam (according to my s3 notes).
Potions of invulnerability and accuracy are at best, slow movers, but more commonly... "shop cloggers."