VERY IMPORTANT NOTE: All numbers can be changed. The concept, above all else, is key.
Strategy and explanations
after her last patch her strategy has extremely changed
Combo:W-R-Q-E or W-Q-E
Her Q once activated will only last the duration and its AOE is a cone and will affect the way she is facing meaning, if she plans to run away she would have to face forward first to stun them before running away and such because once she's facing away. it no longer affects the enemy.
Her W is an ability to single out an important target out of a group so that when she sings it will do more damage to them because of the reductions
Her E is her Aoe Poke being able to damage enemies with lower hp but at the cost of having to get closer to the enemy
her R extremely devastating as it wills the enemies in a cone to come to her harmlessly that combined with her q is extremely devastating as it will cause them to be stunned if planned right
as for her strategy as a support her game play would be to use her Q to make sure enemies not get near her ally. and if they get to close to her she would use her E ability.
though she has an incredible ability for CC she has no actual way of escaping. she has to face the enemy to actually stun them and she could actually be dead before they are stuuned. she could use her E abilty but it would not be that helpful. but to make up for this weakness is her q's passive of gaining ms if she damages an enemy but she is still very soft and has low defense power