Maximum spam with 6 ballistic hardpoints. The real downside of this build is the different bullet speed of the 2 weapon types, so you will miss at longer ranges or if your target is fast enough. It still need some testing, but with good heat skills it should be viable and/or scary
The Rotary AC/5 and 10 size ballistics have essentially the same flight speed and range, so you could try something like this or this Of course, with only 4 ballistics slots in use you could go with the ANH-1X with its LBX10 perk or the ANH-1A with its AC/10 perk.