Fighters/Bombers: Put them in 1 group, or "layer" them?

Greetings captains.

How do you organize your fighter wings? Putting 8 fighters in 1 group is easier to replace/manage but a layered setup seems to be more useful in making sure you concentrate targeting/firepower in small groups without ending up overkilling a single target.

The timelines carrier fleet mission starts off with many squadrons setup in a layered setup and i found it to be quite cool, though the UI does not exactly make it easy to keep an overview.

Simple (Flat) Squadron assignment

Carrier
Alpha Squadron Intercept
Fighter
Fighter
Fighter
Fighter
(Repeat another 4x)

Layered (Nested) Squadron assignment

Carrier
Alpha Squadron Intercept
Fighter
Alpha Squadron Attack With...
Fighter
Fighter
Fighter
Fighter
Alpha Squadron Attack With...
Fighter
Fighter
Fighter

What do you prefer to use?