This is a problem that I have LOTS of experience with. For about 1.5 years and around 250 miles I've been non-winter hiking in a pair of Sportiva Makalu's. They have made miced meat of my feet on most hikes, esp the long ones. These boots just never broke in for my feet and are probably a little too small. All that said...
Let's leave prevention for another time, since you are looking to minimize the current problem that's already developed...
Terrible blisters and lost toenails have been my challenge in my boots. I have found that the best solution for me AFTER damage was moleskin followed by a nice large patch of duct tape extending AT LEAST one inch past the moleskin borders. If space on your foot permits, I would consider the 2-layer moleskin system with the first layer having a hole cut for the blister, followed by a top layer that covers over the hole, then the duct tape. (This method is too bulky for me, esp if adding a layer of duct tape, and is usually best only if it's on a new big fat blister gotten during a hike, or after a hike for comfort.)
Next however, the removal and reapplication issue will be your biggest challenge on your multi-day trip. (I doubt you can go the whole trip with the original setup on your feet because it just won't last.) Personally speaking, I would try to remove the duct tape at the end of each day while trying to leave the moleskin intact. (Perhaps a small thin gauze buffer b/w the moleskin and duct tape can help facilitate this removal and save damaging the blister site. Don't buld up the gauze though, just use it to prevent the duct tape from tearing off the moleskin from over the blister sites.) Reapply duct tape over the moleskin (or new moleskin if you've managed to replace it) and move on.
Personally, I have found that duct tape directly over the blister site is not the way to go if you intend to remove it at the end of the day. (I have used dt by itself, but not for multi-days.) It does more damage to the site and gives you less chance for solving the problem on a multi-day hike. (Not enough cushion, too much friction under the tape for the wound, and forget ever removing this thing without screaming and doing more damage.) Now I guess if the thing is healed up pretty well by your departure day then I could see going with just the duct tape as a stand-alone solution to prevent a reccurrance.
I would also bring enough ms, dt, and gauze to experiment while you're out there or to make adjustments if these methods or others don't work.
PS: I just got new boots (Sportiva Trangos-not the ice climbing version) and my feet loved me on the first 7 mile hike with these boots. Hopefully no more probs with brutalized feet! Good luck and when all else fails I just bear the pain and complain to my hiking partners a lot!
One last thing...those blister packs work GREAT. But not really the best for a post blister fix. They are best as a preventive measure, imho. If you are healed well by the start of your trip then I would really consider either plain duct tape or a blister pack.