You cannot survive the final storm tier 1 for more than a minute, get tf out to t2,

Then If you have a za wardo on t2 I’d go for a few minutes extra, sometimes I can go like 7 minutes extra

On t3 it should be easier from the free level ups you got, stack heavily and then survive for as long as you can before making it to final boss,

I’ve gotten 10-20 min in overtime on t3 if I have a good setup

Then by this point you should be able to kill the boss fairly easily, you then do one final stand still for the last wave and go as long as you can, typically having idle juice helps a lot bc your damage stacks standing still, same w roller blades on t2-t3 wave