As a former mentalism exclusive guy the biggest problem was opening with a mentatlism effect.
What would be helpful are what type of mentalism effects you have. Psychological forces, secret writers, predictions, mind reading, etc.
My mentalism routine consisted of three parts, a mentalism card effect (ESPerfect or forcet), then I would go into my Lotto effect where you predict their lotto numbers you called out using my super sharpie. Lastly I would go into a metal bending or coin bending effect, my favorites were Liquid Metal, best effect I own, or use my superman gimmick. However doing all three of effects was hard, usually I could only do two.
You can use w/e effects you want but try to put some variety into it, making only number reading and predictions can be quite boring to watch.
Good Luck