I've used the Talley one piece system on them with good results. Also, Warne rail and Warne Mountain Tech rings, which seems to be a much more robust setup to me.
I have two Triumphs. My main gun I have Weaver Base and Weaver 4-Hole Tactical rings. For a scope on mine I have a 3-9 Leupold VX-1. Most my shooting is 100yds or in killed a couple deer 150+. I like magnification so 2-8 or 3-9 would be my recommendation. Brand is up to you.
The second gun was my grandpas. He mounted it with Weaver Base and standard weaver rings. He mounted an old 4x Leupold with a 1MOA dot in it. Which is a nice backup or loaner.