Here's the thing. The Old Tie Swarm had a ton of things going for it. The biggest was Holwrunner. Right now the Howlrunner swarm is seeing less play. It has a very hard time with Phantoms, and gets eaten alive bu the new cheaper missile delivery systems. Especially Blount and to a lesser extent Munitions failsafe. The Z-95 swarm you bring up doesn't bring that to the table.
4 Z-95s and a Falcon or maybe 5 and Etahn are the most you should ever be seeing on a table. I agree Zs are awesome, but now both they and Ties are best used in groups of 2-4.
Putting 8 on the table isn't likely to be incredibly viable, although it can work. You just have to be a master of dancing ships across the board, playing it like an epic game. Even then, you'll have troublll agility squads, and high agility squads are very good right now.