If you know all so well and question people’s answers, why ask in the first place?
T2 weapons gets an extra damage bonus from the specialisation skill, 2% per level. Even with T1 ammo. Tech 2 ammo is specialised ammo, not standard ammo you automatically use just because you now have T2 weapons.
And to chime in with the above: the Rokh is a subpar ship for lvl 4 missions because its dps is very low compare to other options, this results in takes AGES to kill a BS target to the point where it becomes silly. If you’re fine with that then sure I guess but it’s going to be a chore.
You can run AB to move away from them and use MJD once every 3 minutes, if you really want to keep max distance.