[HoneyBadger]

Air's a great path-it's got similar artillery spells to Fire, plus Cloud Trapeze, fantastic boosters, less units immune to shock damage than fire or cold, precision spells, and good Air + Other Path spells. It may not have the best high-end spells, but it more than makes up for them mid-game. And it has the easiest access to a Research-booster, which is not insignificant.

Added to which, it's Bless isn't bad at all, just more niche than some of the others, so it isn't taken quite as often.