Finally finished the chore. I wound up having to replace my 35 year old sawzall, guess the job was more than she could bear. On the positive side home depoit had a 12amp with a case Sawzall for 99$. I think I paid about 250$ for the old one, but don't remember.
The pruning blades definitely worked the best and the dirt didn't seem to hurt them much, they did however bend real easy. I burned through 4 blades which is about the cost of the polesaw chain at 3$ each.
Im seriously thinking of adding a cordless unit on the truck. I have a bunch of Harbor Freight cordless tools and the saw is 37$ and even cheaper on sale.
Thanks for all the replies and help!