With the growing number of chasers on SOTA, the CW pile ups are getting relatively busy, even on QRP. On my activation in HB9 during Easter, I had to go to split mode, and even so, it was challenging to pull calls from the "melee".
Over the last few days, I have been training pile up with Morse runner (free software), it has been good fun and you quicly get into it.
I set it up as follows:
CW speed 32wpm
Activity - max number of callers = 5
RX bandwidth = 300Hz
If you add the various noise artifacts (QRN, QSB,...), it even gets more challenging.
The speed is not realistic for SOTA QRP, but it is good fun.