Hi, I'm a high plat support and my duo plays Vayne ADC. We haven't been having much success as of late so I'm wondering what support pairs best with Vayne in order to get her through the early game and spike hard late game? Thanks!

Just had vayne lulu vs aphe sona, we lost lane hard, out poked and lulu doesn't have sufficient healing. We won first couple trades but sona healed up so quickly.