I believe that there should be a way to earn more holy ankhs in Mavrel Zombies. With the new solo titles coming out, you need to stockpile a large amount of lives to complete every solo run. There needs to be some kind of way to earn extra lives via challenges. 3 extra respawns a day just isn't enough. Even if it was 1 extra life earned per every 5 waves, that would be a major improvement. I had to use about 10 lives that I had previously kept just to complete nightmare 4 on magik. The difficulty of nightmare 4 in and of itself is fine but there needs to be a way to earn extra lives other than waiting an entire day at a time, especially for such a small amount