What vertical to go for (Rin e1 vs s1 vs gil e1)

In the title. I got saber e1s1 (yea I know e1 ain't amazing) and e0s1 archer. Use both of em a lot. What would be a more worthwhile investment. I got the full archer team with sparkle and huohuo, while I'm missing mblade so I've been running either rmc or e1 tribbie.