>You need to gain something if you want to give up a Rad.
I know - I suggested it in response to "only mezzes kill us" (and thinking about my own... discomfort... around Deathcaps etc. ID provides res vs. disorient, imm, hold, and knockback, or can be used to free from the above.
>Why add an Empath?
Same reason - it was in the context of "mezzes might be the only problem later on" - clear mind gives res. vs. imm, sleep, hold, and disorient. I switched fort and cm in my head when I typed, sorry. ;-)
As for rad ?> kin, rad ?> emp... in the context of the 8-rad team, I personally wouldn't want to play the kin, since it'd be buffbotting mostly to keep ID/SB up. Nor would I want to play the emp, since it'd honestly be a lot of attacking with secondaries, which would make the emp less effective then a dedicated blaster. (Time bomb with 7 RAs? Hell, Inferno with 7 RAs? That'd be wicked!)
But I digress. I was trying to offer a suggestion w.r.t. the mez problem. I agree that, in well-chosen areas/mishes and with respect to effectiveness, the 8-def group would be superior vs. the kin as far as ease of play goes, and vs. the emp, in almost every way.