Specifically for use with an auto toy the Venus Real wins out (either in soft or very soft).
NPG onaholes are a little tricky to match well.
ZXY - too intense when run in an auto toy. IMO better to use manually.
Maria Nagai (similar to Ozawa) - This one is a single layer one, but the intensity it deliver comes from slow movements, and on an auto toy, it just feels bland. When used manually, S-tier.
Tsukasa Aoi - Amazing. I wouldn't say better than the venus, just different. Venus is a lot more durable though
very curious how the the Yuria Satomi might compare.
I am not a fan of the fleshlights. I get they're way more convenient and easy to maintain, but just not realistic enough.