Yes, you don't need High Places to have a viable defense with those colors and character types.
There is a lot of synergy between palegreen and orange. You've got Crippling Demon and Users of Curious Arts that automatically play either color Enhancement and then you've got Damsel with Spirit of Divination and Deceiving Spirit who can play both as well. This gives you access to a large number of cards that don't have "place" in the special ability.