Hey Folks, yesterday I began the process of helping a large sickly codominant live oak on my land. It is choked out and surrounded by hackberries and 4 inch diameter mustang grape vines. I cut the 1st Hackberry, a 50 foot x 18 inch trunk. I also cut most of the vine trunks around it at ground level. I have a 15 foot reach gas pole saw for the lower level dead wood. That's about all I can do, not equipped or skilled to climb. This will give it more sunlight and water. One trunk has rusty barbed wire imbedded a foot into the diameter, nothing I can do there. That side of the tree the bark looks different, seems like it's sick. There are numerous dead branches that are decayed all the way to the trunk. I see green leaves higher up, so at least some of it is alive. It sounds bleak but I'd like to help it. Any advice is much appreciated.