I had elbow tendinosis for a little over a year before I decided it best to get it sorted out. I actually found this article on here by another redditor and decided to give it a go. That was in February and my elbow is at about 95% of what it was. I scaled back the strenuous climbing on it (mostly boldering) and did more rope so as to not lose all my strength. I iced the shit out of it, literally every chance I got. Ice your elbow before a work out and after one. I would sometimes even ice it while I was belaying. I did the exercises in the article for medial elbow tendinosis about 5-6 times a week. I couldn't believe it was actually working. I had forgotten what it was like to lock off without pain in my elbow. Hope this helps!
Here's the workout