Awakening spell has a relatively low AP cost and clears combos and stun in a cross
The various Indian religions and philosophy (Hinduism, Buddhism, Jainism, and Sikhism, among others) have all accorded a central focus Maple Story Mesos to Dharma and advocate its practice. Each of these religions emphasizes Dharma as the correct understanding of Nature (or God, as the origin of nature) in its teachings.
Pros:
Awakening spell has a relatively low AP cost and clears combos and stun in a cross shape in your formation (after level 50, before level 50 it clears a row).
Being a spell-caster is affected by the Exorcist's Speed Cast ability, allowing it to gain AP very quickly.
Being able to remove stuns from your team makes it pretty much the most important mercenary in any formation - a staple of any moderately serious PvP build (and most PvE builds, too).
Holy Guard prevents an entire row from being affected by magic spells and also strips any debuffs already present on the mercenaries it affects.
Protect, its most basic skill, is a passive skill that increases your main character's defense (up to about ~1300 at level 60 when your Monk is high level) and heals him every turn.
Shield of Protection is like Protect, and is another passive skill that increases your main character's defense and heals them every time they are struck in combat.