You should read the debuff section of my guide. It explains how the stacking works.

I'd recommend using the Water team. You haven't actually invested much time in your current account, and the Water account is one Miracle ticket ahead (3 months or so) of your current account. You can easily get back to where you are with your Wind team in 2-4 weeks of playtime.

You can read the Miracle ticket section of my guide for specifics on how that works. I wouldn't invest more money in the Wind account at this point.