I never said in mangling rules -- I said in routes, and your example shows it as well (unless it is optional).If you dont try, you wont find out. There is no need for Gateway IP in mangling rules.
Are you seriously suggesting to use beta software in production environment?!? o.0Switch to 7.1beta5 and enjoy that 64 bit time.
Is there a way to still mark / count this traffic or is the only way for proper bandwidth management to have fasttracking disabled?You've answered yourself. Fasttracking means bypass of all firewall rules, fasttracked packets only pass through the connection-tracking part of the firewall.