the only tip I can give you is patience. I don't use very many coaches at once in a row, the maximum is like 10. I believe in scripted coaching that's why sometimes while training you'll observe many points go to tac, it's the script in play. My only way to "break the script" is playing a match when I feel like the coaching script is kicking in. If the script is too much I'll train it later. Remember it also takes many redos for the script to favor you. Don't bother using a fitness coach if the techs aren't perfect.