T16 map sustain?

Running T15 maps seems like such a waste of time now compared to T16 maps. The problem is I’m having a very difficult time sustaining T16 maps. I corrupt every single T15 map I get but such a small percentage of them it feels actually turn into T16 maps. I have a tab full of corrupt T15 maps. Is anyone Ming the same problem or have any recommendations on how to get more T16 maps?