The Oxidane at least has the tab key and some non-alphabetic 1u keys (like question mark, etc). If I can fit a combination without the base kit into some 40% layout, I think I’d be happy.
Also forgot to mention, I might buy some wooden keycaps off Aliexpress for a modifier if needed. Can’t imagine mixing anything else with this set otherwise. But it would still be good to know the novelty sizes so I can plan it out. The teal colors and Baybayin sublegends really have me trying to fit a board to these keycaps rather than these keycaps to a board.