Yeah, with a little distance it is pretty easy: Just do it. "Do what?" you might ask. That is rather easy, too. I think, for general health and longevity we could all agree that the following three components are vital:
Lift something (fast or heavy),
train your heart (ballistics/steady state/exercise),
do some body maintenance (mobility/joint work/soft tissue work).
This is one of the reasons why S&S is so great: It features all three components and is very efficient.
But going beyond that is where things get more complicated and are more dependent on goals and context -- and where it becomes more difficult to balance things.
Here are a couple of random combinations, not necessarily geared towards performance but towards sustainability:
PTTP + Walking + Yoga
S&S + Original Strength
Naked Warrior + Running + Flexible Steel
A+A + Swimming + SF Resilient
So the modalities and programming are pretty flexible. I think it would be sane to have a look at risk-to-benefit ratios, as some modalities are more injury prone. However, fun factor might be even more important for some people. I guess this is where this discussion comes in: Exercising in aerobic classes might not be "training", but get the job done for general health.