Okay so just double checking....instead of trying to follow the package directions on Furan -2 I should just dose all 3 (furan - 2 Kanaplex, metro plex) every 48 hrs after a 25 percent water change?
Yes, this is correct.
Today another dose of metroplex is due, so I figure I would dose all 3 at the same time and take it from there every 48 hrs (without restarting the clock on the metroplex)
Yes, good plan ^
As for the copper, raise slowly over 4-7 days? I haven't started it yet as the wrasse's spot's actually have disappeared since the re dip / bleaching of the tank...I was going to start it today along with everything else but should I wait so they aren't getting hit by all the meds at once?
Yes, it's ok to start the copper today. Just be conservative with the first dose since you are starting the others today as well.
If you are worried, you can dose the three meds spaced-out over a few hours to reduce stress (I didn't do this though, and my fish never appeared any worse for wear because of it)