B4 ADC. NEED SUPPORT
I play

I play

Honestly, Just listen to the advice
http://na.op.gg/summoner/champions/userName=cxrdinal
You have a 38% win rate with luc, and 50% with vayne
Your rengar however is 83% winrate with 6 games played.
and your Ali is 67% winrate with 3 played..I would honestly suggest you climb ranked with rengar instead of ADC, because you will probably carry more often as rengar. and secondary role as support with your alistar..
Until you can get your Lucian or vayne mechanics up higher to be able to carry more with those 2.
Just my advice :)