Ashe

Ashe's slow is good with you you can poke your enemies and shield ashe from any danger. her ultimate makes thing easy when you both use them at a single target

Xayah

Xayah can really knock people out when you land a bind she will try to stun them with E. even if minions block her she can use her Passive to atack from behind.

Draven

Draven is ideal. his damage is amazing with lux. since lux bind is so big and hits 2 targets draven can get easy kills. most dravens buy bloodthirster compared to your heal from W (unholy grail) he is unlikley to die.

Lucian

Caitlyn

if you bind an enemy caitlyn will trap them dealing a gigantic poke. their synergy is really great. when the enemy is far away lux can use ult even if she misses caitlyn has a small amount of time to use R on the enemy if he is out of sight