Could you please post the rules? Full contact, point, are take downs allowed? One thing I like to do right before the fight begines is kia so loud you partner, if relativley inexperianced, will freeze and then start off with a front foot direct kick(front or side). I fight strong side forward for that reason (faster&more power). If takedowns are allowed and I am sparring someone with limited ground work or takedown defence I go in for a simple, fast, single leg take down and work it hard. Good luck.