Dont listen to anyone telling you to do it yourself. The fact that there are electrical wires running through it means you should leave it to the pros. Ive done professional tree cutting for multiple years earlier in my career (climbing with chainsaw, as described earlier, and cutting from the ground). Both are quite hazardous and if you dont know what you are doing potentially deadly for tress that do not have power lines running through them. On top of that the tree is dead. Cutting dead trees is more dangerous than alive ones. Living wood will usually splinter in predicable ways when cut, dead wood has a high potential to break in unpredictable ways. For example a dead tree could break 10 about where you are cutting simply from the vibrations caused by the chainsaw.
tldr: have someone else do it, especially if power lines are involved
edit: if your friends first suggestion is to burn it down, then you should definitely not listen to any of his advice on this matter
"It would imply the regeneration of mankind, if they were to become elevated enough to truly worship sticks and stones" - Henry David Thoreau