A 5th ability.

Judging by the posts, I'm thinking the most interesting way to go is: 

• Use passive regeneration
• Add a spell queue to let you queue a single action.
• Have 5 abilities per class instead of 4. 

I'd like each class to have at least one of each of the following:

• A cheap/free stock ability that is readily available. Makes sure the player always has a button to press off cooldown.
• A way to self heal. Because rest is boring, I'd love to make surviving more personal to the class.
• A powerful ability on a cooldown of 30 sec to 2 min. Because it's always nice to have a panic button.
• An expensive but powerful ability. Mana feels pretty cheap at the moment with rest. But at some points you might need to burn down adds quickly, have full mana or be in an encounter that restores mana (like the skel milk beam).

This means I need some ideas for the current 4 classes to begin with. Here's my ideas so far, but feel free to provide feedback:

Cleric [DONE]

• Smite - Remove mana restore, set mana cost to 0. Add a random proc to make your next chastise free and instant cast.
• Heal

  Set cost to 5 mana (down from 20).

  Reduce healing to 15 (down from 35).

  Increase cast time to 2.5 sec (up from 2.0).

• Chastise - Set cast time to 1.5 sec, add mana cost of 15 mana. Remove cooldown. Add new visual.
• Divinity - Keep it as is. Move it to rest slot. Add new visual.
• Purge New - Removes a detrimental effect from a target. 5 mana, 10 sec cooldown. Increases the effect of your next heal on the target by 3x

Assassin [DONE]

• Stab - Made backstabs  more responsive. Restore 8 mana, up from 5.
• Shurikens - Remove backstab mechanic, increase damage to 20 (up from 15). Increase range to 10 (up from 6). Decrease mana cost to 40 (down from 50).
• Flash Bomb - Move to rest slot. Fixed incorrect tooltip, dodge chance is actually 25%, not 15%.
• Poison Dagger - Cooldown is now 5 sec (down from 6).
• Feint NEW - 5 mana, 10 sec CD. Resets your aggro on your current target, restores 25 HP to yourself, makes attacks against the target count as a backstab regardless of positioning for 6 seconds.

Mage

• Mana shock - Leave as is.
• Magic missile - Remove the cooldown, reduce damage done to 20, down from 30.
• Spell Lock - Leave as is.
• Unleash Mana - Move to rest slot. Make it heal the caster.
• ??? NEW - Need a better ability..

Warrior

• Smash - Leave as is.
  
• Battlecry - Reduce pain clearing to 50%, but affect coop player too.
• Crotch Ram - Leave as is.
• Battle Trance - Rename to Protect or something like that, replace the visual effect.
• Rally NEW - Free, no global CD, 90 sec cooldown. Makes you and your coop partner immune to root and silence effects, and removes the cooldown of your crotch ram. Lasts 15 seconds.

For the thongsmithing update classes:

Earthmender [DONE]

• Water Bolt - Leave as is.
• Surge - Leave as is.
• Purify - Leave as is
• Earth Spikes - Move to rest slot, increase cooldown to 45 sec.
• Earth Shield NEW - 15 sec cooldown, instant cast, 10 mana. Shields a friendly player, reducing damage taken by 40% for the next 6 attacks. Lasts 45 sec.

Windflame

• Magma Bolt - Add  a 20% chance to reset the cooldown of Ascend.
• Flame Lick - Reduce magma bolt power increase to 50%, down from 100%
  
• Wind Shear - Reduce damage to 20, down from 30. Reduce mana cost to 5
• Air Infusion - Move to rest slot.
• Ascend NEW - Free, instant cast, no global CD. 30 sec cooldown. Makes your spell casts restore 5 HP and allows you to cast while moving. Lasts 10 sec.

Monk [DONE]

• Palm Strike - Leave as is.
• Focus Kick - Leave as is.
• Chi Cyclone - Leave as is.
• Expel Weakness - Leave as is.
  
• Chi Touch NEW

  40 sec CD, Instant Cast, 0 mana
  

  Deals 4 damage to an enemy every second for 8 seconds before detonating, dealing 20 damage to all nearby enemies.

  Or heals 4 damage on a friend every second for 8 seconds before detonating, healing all friendly players for 20 HP, Pain and Arousal.

Please let me know what you think of these suggestions!