3x10% faster Jagdtiger callin cooldown
OKW: volky bulletins, accuracy > reload (for shreks) > shrek cost > cooldown
USF: rifly bulletins, accuracy > cooldown > reload, would add sherman reload bulletin if I had it
Soviet: depends on playstyle, con or maxim or atgun bulletins
Wehr: 10% vet on MG42 because they're fabulous at vet2 onwards, getting there is the hard part. 3% acc on gren because best bulletin for damage for them. 5% mortar accuracy, 4% burst for mg42, 5% PIV reload for third depending on how I feel. Would use double vet on MG42 if I had two of the bulletins.