I made some changes to the build, your dsts now won't get webbed by spiders resulting in wyverns getting to west crystal. It should work 100% of the time now.
The 3 dsts pointing at west core I adjust a bit so 1 is a tiny bit to the left, the other straight at crystal and the last a bit to the right, it will generally make dsts hit wyverns more consistently, although it shouldn't be neccesary if you have really high stats.
IMPORTANT: For this to be consistent, you need to have a hunt/monk guard summ standing on hint 4 cause dsts are blind af, I also have a 2nd hunt/monk guard summ on hint 1 to make them reach south/southeast earlier. My 3rd char is ofc a tb monk but the 4th can be whatever you feel like really, the most optimal is having your builder warden in after having upgraded towers. If you don't want to upgrade the towers i'd use a 2nd tb monk with monk guard. Picture of bb placement: