New Rek'Sai strategy idea!

I was in a game, playing sai top lane vs sion, and as the lane went on, I made many tunnels. Once I had eight or so, this happened; if jungle came to gank, I could just get back to tower with tunnels. If sion was all-inning me, I could just dodge his skillshots, and kill him. After the game, I thought about it, and what if this could be a new strategy for Rek'Sai? I wanna form this concept into something great, and encourage you all to try it yourselves! Please give any criticism you can ^.^