don’t want to needlessly experiment and waste them.
i assume they stack 5x for 150% exp total(and +5 movement speed) but what about duration?
is it still 30 mins(i think 180 minutes is a bit OP but it would definitely be wonderful if they did) and do they still tick down in town and during queues?
thx.
It will always reset to 30mins. 
Also, don’t [consume] them while you’re inside a cross server instance. No reward(s) get delivered 
so you can theoretically extend the duration and up the bonus by using a cookie right before it expires?
sounds tasty.
Not theoretically, you can. I just did. 
If we have 5 stack, we use another, will it still have 5 stack and refresh to 30m? That will pretty nice 
, 6 cookies then we will have x4 tome for 1 hour
yup basically just another x4 exp tome event since 3 missions + 3 dungeon = 6 cookies. the only unfortunate thing is the duration still goes down even in town/logged out
That’s suck. But on the other hand, we ll have 1h30m x4 tome with 7 cookie, 2h with 8, we just need to store cookie in 2 days and go grind for 3-4 hour to maximum benefit of cookie 
You can also use 3-4 cookie and wait for the next one
No need to max out the bonus right when you can.