i used to stack. hated it. Lower rig fires and gotta start all over. Perhaps try running 3 riggers with one either ran down the middle or angled towards the middle.
I also fish Canadice and Hemlock and let me tell you be sure you have a driver if you do decide to run dipsys. The size one dipsy will spin your boat around as soon as it hits the water. Last year i began using them on the fingerlakes (always run on big boat) out of my 14 footer at canadice. I had my riggers about 3 foot up from me because the ebam wasnt wide enopugh to run them off the back. No my boat tracks pretty good if I climb up front. Now i attached the rod holder i was going to use for the wire rods about 3/4 of the way up the boat and as soon as the dipsy hit the water it spun me right around. After some practice i got pretty good at deploying them out at the exact same time but i moved my rod holders to behind the riggers right by where I drive. Now sturdy rod holders are a must but metal ones arent a necessity like they are on Lake O. The fish simply dont get as big. The plastic cannons you can get at dicks i run. Hope this helps and good luck. Maybe I'll see you out there some day.
The width of your beam and how spread out your riggers are can play a part in it as well. flashers specifically spindoctors can cover alot of water and as soon as they cross eachother your in for a mess. I know form experience and it is not fun.
It is illegal to use parts of gamefish as bait. Get caught and your facing a hefty fine. I second rubbing my flies and spoons on fish in the box to add scent.