When I was doing hay, I had a mower just like that.

What causes the need to combin rows is the feed rate of the baler. I had a round baler that could run at a pretty decent speed and just worked better if I combine two cuts before feeding. The baler made 5ft x 5ft round bales.

It is important that the cut dries nicely before being raked. That style cutter has a roller crimper which helps drying and it also helps that the cut stays nice and fluffy so it can sit and dry before being raked.

Once that cut dries down, it compresses quite a bit. On a 2 or 3 tie bale, that cut will not need to heve a higher input volume to keep the bailer busy, but if you are making 4x4x8ft bales, probably can combine 3 or even 4 cuts to keep the baler busy.