I think the biggest improvement to the rune temple would be a storage space(thus making swithiching heroes easeir in the process), and eventually you do not have to use the temple because once you get all your 100s you can use the senergy feature.
I think the biggest improvement to the rune temple would be a storage space(thus making swithiching heroes easeir in the process), and eventually you do not have to use the temple because once you get all your 100s you can use the senergy feature.