Thornmail needs to do a lot less reflection
Right now it is taking a full hp carry out with only partial damage to the tank being targeted.
You obviously cannot just decide to switch targets. I had a game where my lucian was decked out but no matter what I did, i could not avoid their tank who already lost 60% of his hp. only 40% left and i actually have bruiser items so i am not a snowflake. Still can't kill it without dropping myself to less than 10%.
This needs to be checked big time