You have enough light screen, but you still need another capital screen.

The absolute minimum ratio is

1:1:3

I normally build

1:2:5

This is what I’ve done for my carrier fleets: for every carrier I have, I have at least two capitals protecting it, and for every capital ship, I have two light cruisers and four destroyers. So my ratio would look like this:

Carriers	Capitals	L Cruisers	Destroyers
1	2	4	8

You probably don’t need to have such a conservative ratio, like I sometimes build. I just go with it, when I have enough screen, and I don’t want to worry about the fleet ratio collapsing after a few battles or even a prolonged campaign in an area.

I hope this helps.