As I recall on the VC10:
1. Practice asymmetric was only ever demo'd on Trip 1 in the aircraft, as it included a relight sequence for the Air Engineer.
2. Simulated asymmetric was flown only with a FI during check rides or during aircraft conversion. Or with a FI during civil IRs....
3. Simulated double asymmetric was flown only with a FI during aircraft conversion.
I'm sure that, as far as aircraft handling is concerned, the VC10 is far more benign when asymmetric or even double asymmetric than the C-130, so maintaining currency in asymmetric operation of the C-130 is probably more crucial than it was on the VC10.
If the simulator is
truly representative of the aircraft, simulated asymmetric exercises should rarely be needed in the aircraft. I remember the days when, as a UAS student on summer camp at Thorney Island, observing an MCT sortie from the back of the flight deck included watching an outboard engine being 'T-handled' during a 4-engine roller.....
That took quite a bit of skill to cope with!