Lux or orianna?

Both are fun and play a good AoE burst kit with a shield. The main difference is skill cap. Orianna is hard to play compared to lux but personally I lke ori's playstyle more in lane and out. I only find myself playing lux for her ult. So I'll suggest Ori.

Very tough choice. Both are very good, but I would pick up Orianna because she can push towers down faster than Lux. Both champs have similar mechanics. Either or would work fine.

i suggest lux her aoe damage is huge and can change the outcome of a teamfight battle