I have been using 1/2 a tspn of neem oil in 1/2 a gallon water sprayer to water my plant and drench the leaves. I investigated and found aphids and ash flys that the ants were feeding on. I also found a small hole in the trunk of my tree from which the ants were coming. (More later)
I spent a couple weeks moving my plant between the indoors and the outdoors and I managed to control the fly problem, which in-turn has helped a little with the ant problem. My boss does not want the plant in-doors while the flies are present, so I figured that was my top priority.
The aphids are still present but only on the very bottom section of the back branch and I have been faithfully blasting them off when I am watering. This seems to be the best I can do, and it is working. Slow, but steadily decreasing the number of aphids present.
The ant hole... Well I tried a few things. First, which was admittingly the dumbest, I tried to stuff the hole with tissue and tape it down. All that did was make my tree ugly for a few days. Next I got some non sticky putty (silly putty) and pressed it onto the outside of the area where the hole is. This slowed the ants down, but in a few days the burrowed through the putty. So I did quite a bit of reading about the neem oil I had been using, and came to the conclusion that I could hit them hole hard and at worst I would only hurt part of my plant if any part at all. I got a coffee stir from the kitchen and used it as a dropper. I put 3 or 4 really large drops of pure neem down the hole. 2 weeks later, the tree is doing great still and there has not been an ant since. It seemed like a risky gambit at the time, but it worked and paid off big time.
Thank you all for the advice and keep it up!