I have now verified that the level cap is 65. Your castle cannot go above level 65, which means that no other buildings can go above level 65. That means that you cannot forge gear above level 65, nor can your lab or church/temple skills go above level 65. When buildings are at level 65, rather than saying the stats for the next level on the info screen, it just says ---

Lab and church/temple skills being capped at 65 is pretty much purely theoretical for now, as each level of each skill is going to take something like a week of cooldown. But not being able to forge gear to above level 65 is a considerable limitation. I've already got a lot of gear at level 65, and I'm probably not the only one. For what it's worth, the expected cost to forge a piece of purple gear from level 0 to 65 is about 42 million copper. For a yellow piece of high level gear, it's about 51 million copper.

On the rebellion event (previously the crusader event), I got 48 soul tickets in 6515 victories, which is about 0.74%. If we assume a 1% drop rate, then that is more than two standard deviations below the expected value, so my previous estimate of 1% was probably too high. I got about as many soul tickets from cashing in souls dropped during the event as getting soul tickets directly.

I now think that my Sanada Yukitaka/Tiger of Kai comparison above was actually caused by Sanada Yukitaka's "24 Generals" skill, which increases damage to non-cavalry. I think that that was throwing off my comparison and I didn't realize it.

On the endgame farming drop rates, I've now done opponents 4 through 7 on map 6-4 several hundred times in total. I didn't keep exact counts, but I'm going to estimate that the curse fragment drop rate is around 1% or perhaps a little higher. The two gold ticket drop rate is around 3%. Thus, if you spend 100 koban to get 10 standard rations and burn them all on endgame non-convoy farming, you can expect to get on average about 6 gold tickets or so out of it, in addition to a curse fragment. That makes buying tickets more directly with koban look like a really bad idea unless you're either a whale or care only about the UR drop rate.

In case you're wondering, Temp and Semaphore are the only players who have cleared the campaigns entirely on my server. Nootaku, Aargaez, Vermillion, Arikromus, Nylem, and Rimuru have also cleared the seventh opponent on 6-4. TruelyNice and zantetsuken are the only other players to ever beat an opponent that can drop curse fragments. It is perhaps not a coincidence that I've just named 10 of the top 11 finishers in the rebellion event, with Aqua-chan as the exception.