Giving Underrated Spells some Love

With the many summoner spells going greatly unused, I do believe that some buffs for these poor unfortunate spells are in order. To give some ideas:

{{summoner:2}} Clairvoyance: Now grants true sight of stealthed champions (not wards or traps) for one second after activation.

Cleanse: Decrease cooldown to 180 seconds.

Clarity: Now grants 10% CDR for 10 seconds after use. (Applies to all affected)

Smite: No longer applies Spell Vamp, but now has a built in heal of 78-200 hp based on level. This should help out tank junglers who don't get percentage heal from Spirit Stone.

{{summoner:17}} Garrison: Now applicable in summoner's rift and twisted treeline, and increases a target ally tower's defenses by 25% for 12 seconds, or decreases a target enemy tower's defenses by 20% for 10 seconds. (It's not OP, I swear D:)

So those are just some ideas, and could use some refinement. Regardless some Spells do need some love, even if it's not in this way.