YOUR GAME PLAN
I mean, it's pretty obvious. Hang back, abuse your massive range, farm assists, repeat. You generally want to leave neutral creeps for teammates unless you have the opportunity to steal it from enemies. Paige's gun does insane damage in laning for some reason and doesn't have falloff, so there's that. You want to hang around pushing up waves and joining in on any early game fights to get your free assist in. When you get Transcendent Cooldown, it's just about when wave clearing becomes less of your designated role as teamfights become more common. Make yourself useful and zip between lanes, but don't go for a push unless you have a buddy with you or all the enemies are showing up on the map. You want to abuse your range as hard as you can, really push the limits on how far back you can go and still involve yourself. Oh yeah, and in case it isn't obvious, your 2 is for pushes, and your Divine Barrier is for saves. Once your abilities are on cooldown, you lose relevance, so don't be afraid to run from a fight that looks bad (but only around the mid game, endgame you should probably stay).