half life of esters is a standardized thing, it depends on the hydrolyases in the body that cleave off the ester to provide the active drug
test should be with tren DEFINATELY!!!!!! but that was already said. the androgen receptor upregulates with the amount of androgens in the body so the competition for the receptor is bogus
tren has 5x the affinity for the AR than test does
tren doesnt aromatize nor convert with 5ar which can cause issues with other body organs that use test/estrogen, one of the main reasons to run test with tren
winny is a DHT steroid which does have a hardening effect on muscle by 'drying' it out, which is partly the reason for the joints issues
the combo thing is purely opinion but does make sense
sides depend on the person and how much other compounds they are doing at the same time