After doing 3 dozen rounds of the S target i have noticed every single time the ships with the TAC are taking excessively more damage than the one ship i have that i have not yet put the TAC on due to the time constraints placed on us to get our ships ready for the raid, not by a little bit either but around 50% extra damage.
My current fleet https://www.dahippo.com/bp/ship/#!C07Y04B4B1O1O4U6A004R2Y6PF6F6F6F6F6F6F6F607Y04B4B1O1O4U6A324R2Y6PF6F6F6F6F6F6F6F607Y04B4B1O1O4U6A324R2Y6PF6F6F6F6F6F6F6F607Y04B4B1O1O4U6A32442Y6PF6F6F2F2F2F22AF20ZZdNAN
So was about to go to bed and decided not to bother going in and out of the target to recharge the charged armor and to my amazement i can plainly see the differences with the bugged shielded battery 4 and front line counter measures but this has already been discussed here already: https://community.kixeye.com/discussion/720291#latest
The charged armor on all ships depletes pretty much at the same rate due to the emitters AOE
However the ships have built in 50% tac field already, and with my TAC shielded system 3 (R15) on them that takes their "field resistances" upto 74%... Yet the single ship i have got without it every single time 36 runs now has always been the lowest damaged, not only is the damage it takes less than the frontline countermeasure ship with the TAC3 but the difference with the ones with TAC3 is 50%. It seems that having the TAC installed increases the damage intensity of the emitters rather than reducing it.