Mystics stole their heal skills from clerics and they're not as good, they also stole their pets from Venomancers and these pets are also not as good. They are a mage-type class.
Attribute Points:MAG - This is your main stat, it should be the highest.
STR - This is your secondary stat, you need 0.5 STR per level to equip your weapon.
VIT - This increases your HP recovery rate, keep it as low as possible if not left alone. I recommend a base of 10-20 if you're unfunded.
DEX - This stat is almost completely useless to you. If you choose to go light armor, you put some into it.
Builds:Pure Mag: This is the best build if you're funded and want high damage and high heal. If you get extra Str from equips other than your weapon, you can put into Mag instead to add more damage.
9 Mag 1 Str every two levels
Hybrid: This is probably the most common build. Most with this build cap their Vit at anywhere from 10-30, but the lower the better unless you die a lot.
6 Mag 1 Str 3 Vit every two levels
Light Armor: This is sacrificing damage for defense instead of adding Vit (HP) in normal builds. I would assume they will cap their Str and Dex somewhere.
6 Mag 2 Str 2 Dex every two levels
Skills:Attack Tree:Nature's Vengeance - Your main spammable attack. Max asap.
Swirling Mist - Crappy DoT attack, don't waste points.
Absorb Soul - Pretty good attack, but doesn't affect some monsters, put in points when you have extra.
Gale Force - Also good, freezes and silences but again more of an end game move, pace it.
Bramble Tornado - Good knockback, as you add points just adds knockback. Okay skill, but not awesome.
Thicket - Insane damage, chance to silence and freeze. Max it!
Healing Tree:Break in the Clouds - Your main healing skill as it's the fastest one you have, max it.
Falling Petals - Not nearly as good of a heal skill as it doesn't stack, but it heals a lot all at once. Good in emergencies, but other than that not really.
Resurrect - Obviously good!
Comforting Mist - Mass healing skill, not as good as cleric's, but if you're the only healer in the party it's good to have at least Lv1.
Summon Tree:Devil Chihyu - Does Physical Melee damage, really good tank. You will probably want to max this as it's your only tank/aggro until level 59.
Storm Mistress - Long range metal damaging summon, up to you to level.
Salvation - A very defensive summon, up to you to level.
Cragglord - This summon has DoT skill and an AoE skill, very good... probably the best summon.
Plant Tree:Punishing Sting - Deals physical damage, optional.
Befuddling Creeper - Deals moderate damage and debuffs, optional.
Spidervine - Moderate damage can cause Distract, Slow, Stupify, and Weaken enemies for 12 Seconds, optional.
Listless Blossom - Moderate damage can cause sleep.
Healing Herb - Heals the party members if they're close enough, would recommend a point can help sometimes especially if you're the only healer.
Vital Herb - Increase recovery rate... seems not that good, optional.
Others:Verdant Shell - Gain resistance to wood, water, and physical damage, max it!
Wood Mastery - More damage! Max it!
Rapid Growth - Increases channeling and gives a bonus to magic attack, only lasts 8 seconds though, optional.
Energy Leech - Different summons give different effects, essential but not immediate. Put in when you have spare points.
Heal Summon - Max this! You don't want your summon dying.
Transference - Transfers your mana to your pet, essential, pace slowly.
Lysing - Summoned plants explode, leave it at level one.
Summon Information:
http://pwi-wiki.perfectworld.com/index.php/Mystic_Summons