Agree about ditching the munichs; with an srm of 8, it won't be a wit, since wit means white. The OG is a little above the guidelines (1.044-1.052), but not enough so to be worrisome. You didn't list orange peel or coriander, both of which are essential to a wit. I'm not a big fan of T-58, but you should be ok as long as you can ferment around 65 the first 3-4 days. If not, the liquid strains would be a better option.