Sorry, but I do not know to much about ECM profiles, but most likely very target - subject oriented. maybe some web searches might reveal some sea stories.
The RA-5C was a magnificent airplane - a true "STAR SHIP", and probably the most beautiful airplane I have ever flown formation on; truly awesome to look at from any angle.
Unfortunately, they suffered incredible losses over the North (something like 18 out of 60 as I recall). Flying pre-and post strike missions required a run in at high speed and low altitude, full burner over the target, snapping photos the whole way, many times at night, popping flash bulbs like popcorn. The Phantom went in only on the first part of the run so the Viggie would not get jumped by a MiG. The RA-5C crew was too busy setting up their photo gear and route to be pre-occupied with looking for enemy aircraft. They would both go in toward the coast in basic engine, but once they approached "'Injun' Territory" the F-4 stayed back, the Viggie hit burner and headed down hill toward its photo run. Coming back out across the coast it would usually join up with it's F-4 escort again. often an A-4/A-7/A-3 tanker would be orbiting between the Carrier and the coast to give the returning flight some gas if needed (usually did!).
Tweaker is right - an RA-5 and F-4 flying together in basic engine is a hell of a lot of smoke, especially at lower altitudes!
The Viggie was probably the most difficult plane we had to operate from a carrier. It had very advanced, but analog, systems that were maintenance intensive. It was very large, heavy, and making safe carrier approaches was no easy task. getting slow and developing too high a sink rate was the typical cause of several fatal "ramp strikes". It certainly was not underpowered - it was fast as hell. An F-4 could never keep up with it in full burner.
However, like any high performance airplane flying in landing configuration at critically low speed, just a little deceleration results in a rapidly developing sink rate that takes a large power addition to overcome, and the pilot starts overcorrecting and everything goes to hell. he starts getting fast and high on the ball, sucks too much power, starts to get slow and settling, etc. The LSO is helping on the radio, the pilot (and his RAN!) are sweating bullets, the ship's Captain on the bridge, the Air Boss and squadron CO are sucking up their seat cushions watching all this as it transpires. The Flight Deck Chief is praying for it all to just come out OK, he only needs a couple of more years to retire. At night, a bunch of young sailors working the various jobs on deck are thinking "what the hell did I get myself in to?? I could be at the drive in with my girlfriend, rather than risking getting killed out here!".
Everyone held their breath and watched the PLAT when an RA-5C was on final at night. In my day, the very few newly designated Aviators who went to RA-5s were in the top of their classes. Likely they wanted to go to F-4s or F-8s, but as is always the case in the military, the order is "needs of the service/training performance/personal request".