If it's hung up solidly, I would use a cable to pull it free from the other trees (working from a safe distance of course, and use a pulley block to change direction if you can). You really don't want to get near the tree with a saw if it is hung up on another tree like that, except in a few cases (which I can't evaluate from here).
If it's not hung up, but rather, just dangling cantilevered from the root ball, then I would use a Coos Bay cut to bring it down gently and let the rootball ride back down the other way. If you use a traditional cut, it's going to barber-chair on you and all sorts of bad things could happen.
Proper evaluation is hard to do over the internet, so maybe ask for someone who can give you an opinion on the ground. Really, you need to figure out how the tree is supported and loaded before deciding what to do.