ReCast FF3: War of the Magitek

I feel like the type of person to conclude that the game is broken because they can't beat an optional boss with two people would also be the type of person not to analyze all of their options and miss the fact that Onyx is broken sometimes. I don't feel like it's an effective enough counter-measure to prevent that issue.

Honestly, it would be cool if you added a short event beforehand if the scenario hasn't been finished saying something like (paraphrasing, I'm not much of a writer):

LOCKE: That thing looks tough! We probably shouldn't fight it with just the two of us.

Besides, fighting Tsepmet early is a fun little bonus for people who do know what they're doing. It'd be a shame to ruin that.

I would, but the dialogue script is tapped out. I've used every open pointer and there's only 40 characters of free space left for dialogue throughout the whole game.
For now, Tsepmet remains vulnerable to poison so that players feeling it is a mandatory boss can try Onyx if they're stuck. I'll think about making it immune, but I haven't decided yet if I should.

Another minor bug? Upon carving out "The World Is Square", nothing happens. The game just repeats that nothing appropriate is coming to mind.

You have to carve it in backwards.
ERAU
QSSI
DRLO
WEHT

I know it doesn't have the feedback strings to tell you what you put in and got in the wrong order, but I really needed those dialogue strings. When I did it, I recall testing against the vanilla experience and it was similar (I think I got "WEHT DRLO QSSI ERAU" and then "Nothing happened"). I know it's a little harder without the feedback string, but again I REALLY needed that space (Most of the Terra scenario's new lines use those pointers).