just one more answer then I stop it (we have run a bit offtopic didn't we?)
The air strategy isn't very complex. The oversimplification there cuts down on a major option : prioritizing targets.
Say you have 8 fighters to defend a city (which is a lot, but you said you'd have 8 fighters to just "take the hits").
You may hit 8 attacking units. Provided they also send in fighters, you're not even sure you don't get hit
On the other hand you may be lucky and let the 8 opponent fighters pass, and hit 8 bombers
What I would like is giving priority to intercept either fighters or bombers.
Meaning that you lower drastically the odds to intercept the other kind while climbing higher on the one you target.
I would also like "counterinterception" priority option on fighters. Meaning you could give a fighter the option to cover a bomber.
I'd also like a "shoot for the kill" option. Meaning that once a plane is "intercepted", it gets shot at by all available fighters until it dies. Those units cannot intercept anymore, but you've got a higher killing ratio.
...
So many possibilities, so little implemented in civ.
As a conclusion to this last not quite newbie issue, I'd say
- the game isn't unbalanced on this topic, since facing 28 units with 8 units on your part isn't really "equal strength". With 28 fighters defending a tile, you'd have a lot more success on defending it.
- air combat is very lightly implemented, without any good tactical options. Don't look for very deep tactics, there aren't any.
There we would be back to paper scissors rock that made this civ version so good.
The air strategy isn't very complex. The oversimplification there cuts down on a major option : prioritizing targets.
Say you have 8 fighters to defend a city (which is a lot, but you said you'd have 8 fighters to just "take the hits").
You may hit 8 attacking units. Provided they also send in fighters, you're not even sure you don't get hit

On the other hand you may be lucky and let the 8 opponent fighters pass, and hit 8 bombers

What I would like is giving priority to intercept either fighters or bombers.
Meaning that you lower drastically the odds to intercept the other kind while climbing higher on the one you target.
I would also like "counterinterception" priority option on fighters. Meaning you could give a fighter the option to cover a bomber.
I'd also like a "shoot for the kill" option. Meaning that once a plane is "intercepted", it gets shot at by all available fighters until it dies. Those units cannot intercept anymore, but you've got a higher killing ratio.
...
So many possibilities, so little implemented in civ.
As a conclusion to this last not quite newbie issue, I'd say
- the game isn't unbalanced on this topic, since facing 28 units with 8 units on your part isn't really "equal strength". With 28 fighters defending a tile, you'd have a lot more success on defending it.
- air combat is very lightly implemented, without any good tactical options. Don't look for very deep tactics, there aren't any.
There we would be back to paper scissors rock that made this civ version so good.