So, just to have the general opinion here...

When I look at the ATK choices for the Event Boss, I see
10 Neckties = 1x attack
20 Neckties = 3x attack
40 Neckties = 5x attack

Am I wrong to think that it's best to use 2x20 instead of going directly to 40? You get twice more rounds, so twice the occasions to use critics and solar blast.