Firstly, remember that you are a tank. Your job is not to be top DPS. There will be comps where ypur rein is pointless af, and you're just a walking Ult charge. Do not charge a target just because it looks juicy, there will be times where the opportunity seems right, but during a charge you can be killed. Fire Strike and push up, only charge when you have support of the team. Lastly, drop your shield and put it up while jumping back and moving forward for speed reasons. Don't drop your shield to random charge and attack, you are a tank.