Pyros Light and Lines, what am I doing wrong?

[Deceptus]

Yes, you'll want to keep any rolls you get up to getting 5 lines, after you've accepted 5 lines every roll after that will also be 5 lines, so then you can start picking and choosing which rolls you want to keep or throw out.

Problem is, I'm stuck on one line and not getting the 2nd. Yes, RNG is RNG but this just seems absurd. My relic is only 15% of it's potential stats because of RNG.