"Basing 6mm Punic Wars Romans" Topic

I'm rebasing and expanding a collection of H&R Punic Wars figures. I inherited them from a couple of friends years ago, and am building them into BBDBA armies. My question is about how to base the Hastati and Principes. In DBx they both count as Blades, so there is no special distinction between them. The H&R figures for the Hastati have them throwing pila, while the Principes are depicted in an advancing, but not fighting, pose.

My idea was to base two ranks of figures on a base; the first of Hastati, the second of Principes, the reason being my understanding that they fought integrated as a sort of proto-cohort. Is this reasonable? Or would it be better to base them as separate types, so the Bd elements are split between Hastati and Principes? I'm not sure. Silly, I know, but I'd appreciate people's ideas about the basing.

Many thanks.

I base my 6mm figures on 40mm wide bases, 15mm deep, 2 rows of 10 for solid Blade. One row of Hastati, second of Principes. It is rare that these would be in a two element deep column for combat, so I think this looks better than elements of each type. These are for standard size games, with only 6 elements.

If you think you will be using multiple ranked elements in lines, then I would do each type of separate element. Then you can have 2 lines of Hastati, then 2 lines of principes, and then a line triarii.