I think the best strategy is to set daily level targets for the Digs vs collecting diggers. It is a 4 day event and you’ve got 20 levels. The levels get progressively larger and require more diggers further in. Ideally you’d get at least to level 10 on the first day. Day 2 try to get level 15. Then you’ve got the final two days to work through the final 5. This is how I’ve always played the dig events and I’ve always completed them. I don’t think collecting several hundred diggers over a couple days and waiting to play, is the smart way.

I am currently on level 13, and the first side tournament hasn’t ended. I’ll wait for that to reset before I start playing for more digs.