I cant blame you for finding WHM boring when doing MSQ, you only have to use 3 skills when fighting monsters and 2 of the 3 are dots. You cast Aero single, Aero AoE then spam Stone, its boring. I leveled my WHM to 35, then played a DPS class. Healer classes are awsome when leveling through dungeons, but when doing solo content, they are slow and boring. My advice OP is to change into a DPS class, changing into an SCH or AST will just as boring. AST only has 1 dot and 1 single attack, SCH as 3 dots and 1 single attack.

My advice, play a class that is more engaging. Monks, Dragoons and Ninja are fun classes and you wont be spamming the same 2-3 skills.