Nothing is true, everything is permitted. In all serious though, i feel almost everything is viable in mage wars as long as you're spending time to learn to use it, and play it better than your opponent. However, i personally think they are too squishy to rely on, and even the full action seems kind of meh against a control build, as they usually have a high channeling anyway. You might get lucky andmessages calculation or two up, but the mana leech is right on the board so they can calculate that in.