Hello, my bot is not drinking water or eating food. After combat if he is too low he just stands there until he regs back up to full health.

I checked the settings and told him to select the best avaible. Still does not work. Any advice?

Best available is hit and miss. It tries to read spells from the game. 
You might find a helpful plugin here: https://wrobot.eu/files/category/177-plugins-multiversion/