Hall of Fame Member
Would Kallis really trouble the likes of Tendulkar and Sobers if McGrath and Garner haven't had any success against them? I think it unlikely personally. So you're basically picking Kallis as a guy to get through a few overs with the old ball to give the mainline quicks a rest. But if those mainline quicks are McGrath, Marshall and Ambrose, they won't need a rest because they'll take 10 wickets before the new ball most of the time. Especially bowling to batsmen who are averaging in the 30s.To the contrary: the higher level the side, the more stress is placed upon the main bowlers - meaning a fifth bowler is more needed.
Stokes is going to help a rubbish team way more than Lara or McGrath. But I'd take Lara or McGrath over Stokes in an AT side. It's the same for virtually every all rounder, except Sobers, Kallis, Hadlee and Miller who all have a shot at an AT side on their primary discipline alone.
Of course all I'm doing is talking in hypotheticals and giving my opinion. But I think history tends to back the theory up - sides who run 6/1/4 team balances are the norm unless they have a truly exceptional all rounder available, or need to compensate for having rubbish bowlers.