Spending the rest of the day grinding turned out to be a loveless task. As he was now free to go directly into Tier 16 (which spanned the levels 81-85), the difficulty increased quite a bit. For John himself, that was less of a problem. His skillset was quite solid, and with Siena actually helping the group, if only as little as possible, they did have the necessary power to deal with what the system threw at them.
Lydia and Rave, however, had a few issues keeping up. Punching 10 levels above their weight had been possible thanks to the innate advantages of being sapient beings, but 20? They weren't dead weight, but neither did they have any hope of soloing any mob in the Instant Dungeon. John had Undine be close to them for most of the time as they were the most likely candidates to be injured.