This type of things should not be needed or your primary way to deal with something, it is just dumb and just proves by itself how broken is Tactician.
i don't think it's 'cheese' actually. it's kind of a realistic thing to do, something you'd do in a PnP RPG (well, if we accept that it's not possible to climb over objects). it's more realistic than having knockdown blocked by armor, for instance. i don't quite get what happens on your screenshots, though. is it about blocking the doorway with something and then setting the floor on fire?
