Misfire while cruising

Sorry about the delayed response. I had a local mechanic my employer works with hook it up to the computer and he couldn't find anything. His suggestion was to change the plug wires and boots. I did that over the weekend and it seems to have made the problem less apparent but it's still there. It also only happens with the AC on. If I turn the AC on while driving, I will notice an initial miss as soon as it turns on. My guess is a bad ignition coil but would like another opinion before changing for around $180 (parts only).

So I cleaned the MAF last night, but the hesitation is still there. It's almost as if when the AC compressor kicks on, there is a drop in power which is what I am feeling. However, I had a 2011 Impreza (very similar internals as the Forester) before this and didn't have any issues. I feel like there my be an issue with the electricity distribution system (fuses, relays, or alternator).

I have finally figured it out! The hesitation was caused by the AC compressor working overtime. That was caused by a low level of refrigerant. I added around 8 ounces of r134 and everything has smoothed out. I can't believe something as simple as that caused such a nuisance.

Also, thank you everybody for chiming in and helping out. I'm sure it didn't hurt to clean up some other parts in the process!