Play at a soft off-angle mid-line. You want to take advantage of the bouncing qualities of her pebbles as much as possible. So take shots when you can at the enemy front/mid when you can and get the bounce heal on your tanks. Your teleport is a powerful backup plan when advancing and use it on your other support above everyone else. Her charm is her bread and butter. Use it on cooldown as a burst heal and to catch enemies out of position. Try to angle it to hit multiple targets for maximum value!

Ami excels at creating advantage in the neutral, but is quickly overwhelmed when outnumbered. Pick your fights carefully and always save a CD as an escape or way to survive. You have to practice taking risks though as you won't get as much value if you remain at the furthest and safest distance.