It really doesn’t feel like there will be a viable Elena-only run. It’d be nice, but breaking Layla’s heart kinda wrecks the relationship.
On the other hand if you get maximum Elena points yet stay with Layla, it really looks like Layla would be open to a throuple. She’s fine with fooling around with Elena herself; she’s fine with the MC getting sexual with Elena when she’s present. As long as the decision ultimately lies with her, she’ll go for it.
At some point they’ll all be in Layla’s room, Layla will tell Elena, “It’d be so hot if I could watch him fuck you,” Elena pretends she’s annoyed and reluctant but she’s down, and the MC gets to make sweet, sweet love to her while Layla frantically jills off and cums hard. Be honest, you’d rather see that than the Elena-only scenario.