Optimal %Wall Thorns

I’ve just recently been running the Wall and doing some level of Wall Thorns lab, currently sitting at 10%.

I’m noticing that low %thorn affects survivability but allows enemies hoarding which improves coins gain (kind of similar to devo) While higher %thorn nets lower CPM in trades of reduced damage taken.

So what is the sweet spot to stop Wall Thorns lab which balanced out between Econ and survivability? I’m thinking of stopping at 14% but not so sure about that…