Spend more then 2100 key for gate and you will get a lf4. i use only 5 energy boost and i get every time lf4. If u use less then 2000 not lf4.
I build them the other way around, I use gg 1 by 1, and if there are like 15 gate parts left to be build I click 100 in one timeQuote:
for me i use 100 till i get 60% or 70% of the gate done then i only get loads of multiplyers so i use the 1 gg spin so i might get a 6 multiplyer on a gg part