What clutch kit

I’ve burnt my belt out on my 700 Grizz. Only done 1000 miles. I competed the Croatia Trophy last year. Which is a hard trail riding event. Since then I’ve done a lot of road miles. Last week I spent a week in Scotland riding some very technical trails with a lot of winching involved. Which I know is bad.
I have a set of 28" Kenda Bearclaws, which are actually 27" when measured. It’s snorkelled. A rad relocate kit. Apart from that it’s stock.
I was thinking about a basic EPI kit and severe use belt. Is the belt worth it? Or should I fit the clutch kit and a standard belt?

My riding is mainly fast trails with a bit of winching and a bit of mud.

What do you experts think and recommend?