We love Clank! After dominion, our first modern euro (not counting settlers of catan) we got Clank and loved it. The majority of games we play are only my gf and I and while clank does work as a 2-player, its much better with 3 or more. Thus, it does not see the table often as other games.
However, we got Clank Catacombs soon as it came out and loved it. Works better as a two player too, because the routes are not so predictable. We had some games with super easy dungeon escape routes and others where almost everyone died trying to escape. I love that aspect of the game.
There are also a lot of cards that make +clank and this makes playing much more dangerous. I like that since dying in original clank was rather rare. Dying below the green line happened maybe once or twice in al the games we played of the original in 5 years.
Catacombs is borrowing some aspects of legacy and I think it really works well.
Seems like something that could be improvised, I would not spend 3-games on it :D