This guid will help u play leona bot like no other. i hope. first guide iv made but this is how i build leona.

You want to build these as tankie as u can and you want the mercinary masteries beacause you should be getting alot of assists. the initiator masteries will help you keep up so you can keep the CC going.

these iteams are set up to keep up with the natural progression of the game when dealing with the meta. The money iteam is needed for obviouse reasons. The cooldown boots help you CC all day. if your haveing trouble keeping up with people or just want more chase ability you can go boots 3 .The sunfire gives u passive damage when tanking and gives you health and armor to help stifle the ADC. Sheen helps u put some pain on incase u needa pick up the kills. it helps alot and will eventually turn into trinity force. If u wind up takeing the carry role your self u can substitute it for lichbane later on. the next iteam u want to build is abysyal cepter as this should be the point in the game where you are fighting more of the team. it helps lower there magic resist and raisies your own while giveing a bit of damage. Next you need more health, i suggest Rylai's for the reasons that it adds to your slowing ability and gives you the abilitie to bring the pain while provideing health. if you are haveing survivablitity issuse then i suggest a warmogs instead. now its time to fisish t-force and start destroying teamfights. finnaly turn your heat of gold into randuins or sell it for more health such as a warmogs or more damge IE a lichbane.

The Zenith blade will help u get an easy lvl 1 kill sometimes and should be maxed first as it is your key ability. the stun should be taken 2nd and max 2nd as it is a really great stun and should be used after zenith blade to help pick up kills. the sheild should be taken at lvl and maxed last. take your ult every time you can as it is a really great ult. if they are in the center of the circle when it goes of it will stun rather than slow. there is a slight dealy so u wana try to leadem a little. if u cast it when there in the fringe of the cicle it should prock when they hit the center. this abiltity can make or break team fights so practice up.

I take ghost and exhaust to add to chase ability and help my team pick up kills.

Pros:
Good chase ability
Amazing CC
Great survuvability and Damage
Cons: sacrifice some surviability for Killing Power

You need to let your ADC get all the kills that u can. with the mercinary masterie youll get fed too anyways. in team fights wait to get swarmed and drop your ult on the whole enemy team. then CC there damage dealers non stop untlie they drop. and your primmaray job is to make sure that no one escapes. Tower diveing at later leavels isnt always a bad idea