Use direct NFS access for the files on the SE instead of dcap (I've been having issues with some files with dcap, I've contacted the T3 admins)
Use 1 core instead of 4 for slurm jobs -> do not use the -t 4 argument anymore! With the new LCG and ROOT 6.22, memory usage goes down from about 7GB to 1.6GB when running with all the systematics (9000 produced histograms), so it won't bring much to run with multithreading. More checks would be needed to see if it would bring any improvement.