It is possible to get good rates with the fast discriminators with a few hot channels mask in aida03 and aida10
Threshold is 0x20 = 3.2 MeV

They can be tested in beam to see performance, especially note the first setting will involve alpha emitters to check in AIDA

All FEEs:
AS01 01, AS3 07 10 13 are masked

aida03: 
AS0 12 and 14 are masked in addition

aida10:
AS1 10, 11 and AS2 05, 06 are masked in addiction