I use diamond club for all my F class travel and I have recommended AC for an age, but if you are travelling Y, don't spread yourself too thin.

You are only 24000 away from Gold on TG, and lounge entry alone has to be worth it if you continue to fly Y

However you will get a return trip upgrade, which will be fun. There's more as you know, BUT nothing beats Gold if you use it properley regards bkkrop