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It's more of a discussion about the Overlord. Yes, he's strong and cunning, but not all of his plans go as intended. Although "Dark Messiah" (?Mod) has two endings, one of them is good, which means the Overlord was on the verge of failure with his plan, not anticipating everything. And with such capabilities, unique magic compared to other factions (no one else can manipulate their appearance and transmit their images over a distance), and the largest army in Ashan (as you yourselves said), he couldn't execute his plan properly... It seems a bit weak.
I voted for Tieru and still don't regret it: firstly, he is, after all, a Dragon Knight. Besides, he knew about the demons' conspiracy, healed Agrael, and gave him instructions (which later turned out to be the only correct ones). Even after death, like Qui-Gon or Obi-Wan from Star Wars, he managed to stay in Ashan of his own volition to "guide" Findan, and of course, Railegh. He was also obviously a very powerful elemental mage (creating fog over the entire archipelago is no joke).
In general, theoretically, Sar-Elam should be the strongest, if we're talking about the Overlord. After all, he imprisoned the Overlord and all the other "bad guys" with a single spell.
I voted for Tieru and still don't regret it: firstly, he is, after all, a Dragon Knight. Besides, he knew about the demons' conspiracy, healed Agrael, and gave him instructions (which later turned out to be the only correct ones). Even after death, like Qui-Gon or Obi-Wan from Star Wars, he managed to stay in Ashan of his own volition to "guide" Findan, and of course, Railegh. He was also obviously a very powerful elemental mage (creating fog over the entire archipelago is no joke).
In general, theoretically, Sar-Elam should be the strongest, if we're talking about the Overlord. After all, he imprisoned the Overlord and all the other "bad guys" with a single spell.