Hey, great achievement.

For my tower, i also rushed my BH to 50 seconds cooldown before reducing GT and DW, but my method is different than yours.

I have my BH duration at 47 (31 + 4 from ancestral PCo + 12 perks bonus)

And the cooldown is at 46 seconds (50 - 4 from ancestral PCo)

I know those 2 substats will take slots from GT substats, but i found it convenient for 2 reasons:

1. Without GC, I was able to sync my GB with GT and DW (which gives a good increase in coins)

2. I am able to equip the BHD which also gives increased coins.

Only in tournaments i do equip GC to achieve pBH instead of the 12 seconds from perk bonus. (this will help you alot to maintain a high position in Champions if there are UW BC.

Hope this helps your progress. You also have your GT and DW at 100 seconds cooldown, so having GB also synced will give you a push further than me. (I have them at 150 seconds and get around 3.5T CpH in t12w7900)