Yeah, in my experience, Mablung is one of the main strengths of Ring-bound rangers (indeed, he's one of my favorite cards in the game), as he can, with 2 exertions, take down any roaming minion. Unless there are no strong minions in your meta (e.g. all swarm/medium-sized beatdown) there's no real reason for a RBR deck not to have him.
And, yeah, go with
War and Valor over the token-spotting events. Since you have no
or
cards, you're never going to get more than strength +2 out of
Trust/
Mortal Men, but
War and Valor will give you that and usually an additional point of strength and damage (a good RBR deck will keep the minions roaming most of the time).
