There is 3 type of teamfight ultimate imo;

1st -> The starter of teamfight, Main setup skill (for example; Ares, Odin, Xbalanque's ults)
2nd -> The executioner of teamfight, The ending act on main setup (for example; Scylla, Zeus, Discordia, Nox, etc)
3rd -> Having both. can be used as main setup or final execution (for example; Poseidon, Baron Samedi, Hades, Hou Yi, Artemis, Guan Yu, Thor, Hera)

So imo the value between these 3 type of team ultimates is like this; 3 > 2 > 1

So consider this fact while judging this list.