VFoS berserker vs Magma mines saboteur, as a one build a league kinda guy

I tend to mostly stick to one build a league, while playing something i havent tried before. I have narrowed it down to (probably, lets say 99%) VFoS or magma mines saboteur.

I level at a steady pace and im definitely not doing T17 on day one of that has any bearing on things.

I would guess VFoS is the safe choice, but i also do love some mine/trap gameplay and rolling magma looks like it could be fun.

I was hoping maybe someone could steer me in the right direction, so maybe this time im not deciding 5 mins before league start :)