Hi! This is my first guide and i don't wanna write a lot about it. I play with this build since a week and i found it good so i'd like to share with you. So something about Leona:
She's one of the best tanks and she's also a great supporter. I like her with a strong melee dps for example.: Jax or Xin Zhao. Using her skills is simple. First use your 'W' skill for shield yourself and do some damage when it explodes. Next use your 'R' skill on your target then you can easily stun your enemy with 'Q'. 'W' is very usefull in creeping.

Well finally sry ford the bad language and thx for read my guide, and if you have any questions write.