If I'm the Mike you mean....looking at one bad year of Wallner instead of all his years is not what I'm interested in at all. Looking only at BA or RBI (which is a function of players on base in front of the hitter) is not ideal, but not awful either. Wallner was not good last year. I'm not giving up on him like so many here are. I think people appear to have no idea how low batting averages are these days, when comparing to teams even 10 years ago, let along 30-40 years ago.
I'm super not interesting in signing mediocre veterans to block the four AAA players you mention as possibilities at all. Like, I'm very uninterested in watching guys that aren't all that good who they won't DFA. At least with them, there is hope.
My solution to the OF is Roden and Martin to start the year, with Wallner at DH and sometimes in RF. Buxton in Center. I'd prefer Jenkins or EmRod start in MN over one of those, but that isn't happening with this team, I think. If Roden and Martin aren't good, call up the next guy. I don't have a strong feeling for OF 4/5 as the backup. Preferably not someone old and bad.