I just wanted to play a little with ya is all

Sure, I have plenty of advice to share, (Ia m a crazy guy who runs 2 of them and is considering running all 4 teams as Crit teams )
but first it would be good to see whom you have in your collection, which characters are you considering and which never (you mentioned Xmas Rose as "never").

Also do you want to run a pure crit team or do you consider a mixed archetype ? Depending on that we can whim few combinations togather.

As for Streptocarpus - I wouldnt recommend her. As a Crit girl she is very fragile, and her skill requires her to get hit, which is kinda counter productive to her role. As such I would stay away from her, unless you can get a Negate skill in there somewhere, in which case she would be very good.