Well, I've never got the treble either!

The best way to get it is to start the season with an average Team and buy a bunch of guys at Season start. This doesn't work for my style of play, I keep a full squad and they all play... so the Treble is a DREAM for me. Maybe in a couple season where I have some guys retire I might make a push for it.

The easiest time to win Cup is lower levels, I think. Nikol you could trim down your Team to like 8 or 9 of your favorites and put low star guys to fill up to 14, maybe your free youth, a couple 3 stars to bring your average down, at season end. And then after cup draw buy some good players. The problem with that is of course it takes lots of Tokens to buy players at the beginning of the Season!

I have lower level Team that have won the Cup more than BvB andI think that RJSlow is right, a weaker team/less managed has a better Cup draw.