Toxic rain champion, recommendations to improve the build

Good morning, afternoon or night, depending on the country, I come to expose my build a little, of which I feel that I could perform more, but I have been playing POE for 2 months and I do not understand the combinations too much, I would appreciate if someone more expert with this type of builds would give me some tip of what to do to increase my DPS and defense together more (considering some defenses that I have low) to achieve a better performance. Here is the build code https://pastebin.com/qJmzJDjj

Post data:I am sorry for the mediocre English I have, it is hard for me :(