when Laning you should be agresive ageinst close ranged champ's and defendsive ageinst renged champ's

when harrasing you should jump enemy's with Zenith Blade and Eclipse. and then stunning with Shield of Daybreak

you start out with Philosopher's stone- Boots of speed- Heart og gold-

before buying any items from the late game item's you should upgrade Boots of speed- to either
Mercury's Treads- for ap Enemy's or Ninja Tabi- for ad Enemy's

then you build the late game item's Sunfire Cape- Atma's Impaler- Warmog's Armor-

If you got feeded you should upgrade Philosopher's stone- and Heart og gold-

My Choices


Heal - Is now very viable from it's remake. It fits leona perfect and allows your team to live longer.

Flash - Utility spell, can be used to everything.

Useable


Ghost - Utility spell, I used to go for ghost over teleport but I feel now that Heal is even more useful than ghost and teleport.

Exhaust - Anti-Carry spell, can be used to save someone from their carry.

Ignite - If you need that last bit of damage, although you should be with your team!

Teleport - Useable to stop a push / push, can also be used as an escaping tool.

Not recommended


Clairvoyance - Support spell, I don't like it on Leona.

Clarity - You are not very mana reliant.

Smite - Not a jungler.

Revive - Even if you die, it's for your teammates to win.

Surge - Not an option.

Cleanse - You can survive a whole lot of cc without dying, this is a waste.