Rework Tryndamere's ultimate

Tryndamere's ultimate is broken. His ultimate is similar to kindred's, where he cannot die for a certain amount of time. The thing is kindred has a much higher skill ceiling than tryndamere, as you need to think before pressing R. Tryndamere can press R and tower dive and do whatever he wants for the duration and not die. Yell at me all you want, but at least nerf his ultimate so that towers can kill tryn, or something similar.