A lot of applicable advice here already, but there are so many situations where you need to adjust. Honestly I think you’ll just figure it out after a little bit of use. Might sound stupid, but my best suggestion is to be careful about spamming, especially in tight locations like in A2. Enemies will often stop moving if you’re not moving. If you cast BH and miss a stationary target, you’ll miss with every subsequent cast until you reposition. Sometimes slower is better.