New PB: 1:45.06
Tips:
Hope these can help :D
1) Tower placement -- stack towers on top of each other
2) Repeatedly tap 'E' to refill towers -- Before towers shoot just spam 'E'. Not sure if this is faster but I prefer it more than holding E.
3) Position when filling up towers -- you have to be closer to the collection area
4) Not fully charging towers -- I noticed its somewhat slower if its fully charged as compared to filling it up when it spawns so it shoots faster.
I'm also trying to figure out if gold spawns can be manipulated. Will update this post if any advancements are made.
A sub 1:45 should be interesting to see, it is possible for sure.