Introduction
Kalista is a champion with high mobility and an even higher skillcap. I feel to master this champion it will take a while but she seems extremely fun and a very good pick into a teamfight composition.
Tested triforce, worked great,
Note: The skills box isn't showing for me at the moment. Will try to fix as soon as possible. Still isn't showing up -.-
Summoner Sets
Flash & Heal
What i usually run. Gives you a bit of HP and a cheeky speed boost. Standard for ADC's atm.
Flash & Barrier
Can help survive vs someone like Zed etc. works well when ignited as grievous wounds reduces all incoming healing effects. Barrier if timed right can stop a few ticks of an ignite potentially saving your life :)
Flash & Cleanse
If they have a lot of crowd control. I would very rarely take this unless they literally have like Malz, Amumu and Leona on one team.
Early Game
Try to poke as much as possible with your 550 range, and feel free to use E as a way to last hit if needed.. Try not to go all in without some help from your support, because Kalista is extremely squishy early on.
You WILL need to rely on your support for the early game.. a good support means a good laning phase for Kalista
Mid Game
Once you get a few of your items, you will have a little more room for error against tough matchups, but be careful of Vayne still, as she will rush a Blade of the Ruined King... She will kill you in a duel... be careful.
Against other opponents, you should pretty easily out damage and out CC them, so keep on them as much as possible.
Late Game
Be sure to stick with your team. Your Rend active will allow for cleanups after fights and her ult is a great way to initiate and also sway a team fight in your favor..
Remember to use your ult accordingly, if you see a team fight turning south, don't be afraid to pull your Oathsworn target out of enemy hands and leapfrog them away.
Teamfights
Same thing as above, be sure to use your ult during team fights. It will be deadly with a Yasuo ult, so be sure to try to stack it whenever he is on your team.
Also, your E is a amazing tool for cleanup.. So use it to your advantage, as killing an extra player after an even fight can easily score you an objective.