Factory's second row theme?

Hi all,

Sorry for my english. I stumbled upon the right words to express.
What I mean is this:

I just know that in every factory build ui, there's a theme for each slot.
In first row, from left to right:
- Construction, Raider, Skirm, Riot, Assault, Arty

My question is for second row.
What is in the first column? It seems it always for lighter raider.
Second column is AA.
Third column is that factory signature unit.
Fourth is bomb (not always, but usually very small unit compared to others)
Fifth is?

Thank you very much, and sorry for confusing question.

quote: Weird Raider, Anti-Air, Heavy Something, Special, Utility

I read that as Special, AA, Heavy/Special, Special, Special.

This is bad, especially (sorry) for newer players.

quote: non-combat

quote: Tremor

lmao

There's a reason why I said it was used for non-combat units and ALSO Tremor.

I don't remember why the wiki entries are in the order that they are in.