It'd be counterproductive. The role has zero to do with putting heals on target, but registering every single incoming mechanic and processing how to influence that specific fight. Every situation has any number of methods for anything. The hardest mechanic to cope with is the likelihood that someone at random TLR raids and hasn't the willpower and/or maturity to recognize that it takes more than luck to accomplish things. It's more of a benefit to practice in real time while asking for help, browsing the social media channels, and consecutive practice. Throwing heals on a deadweight dummy just to see the quantity of healing teaches nothing. The real lessons come from perseverance through failure and embarrassment.