Yes most of the players who play with me are lich are they have completed more levels than I have. I'm currently castle 23 with 59 completed and 55 perfected. 4 players above me on my team are lich with 61-66 levels complete and 57-61 levels perfected. They are castle 24.
Oh my bad, I thought you were talking about perfecting stage 80 when you said you've mastered void. I've also completed most of the stages and just haven't perfected some of the timer challenges because Lich please.
2 Heroes Less and No casualties are very easy for Lich. And I thought you were mentioning Lich players who have perfected stage 80 as "mastered void" suggests. And since 3 Heroes or less only applies to Stage 80. Well, I could be wrong. But that's how you present your first comment.
My suggestion is to have a challenge selection since the timer challenge are best for humanoids while no casualties/less heroes are for Lich/Mech alone. Just so it can be flexible for all the races. Nothing more.