The problem is that with blks = 2, the PCH preemption cannot be activated. Therefore, the AGCH might congest.
I am not saying it *will*, but it *could*.
Therefore, it is safer to try “BLKS = 1 with Preemption” rather than “BLKS = 2 without Preemption”
Anyway, just try it out, if there is congestion, just change the settings… Let me know what happens.