for a long time player like you, it should be no secret, that IM-Mercs are always very powerful. They are designed to be sold, so they must at at least as good as the best ingame Mercs. Christine is better than PAtriot (damage wise), Attila with his self seth is the best TGS-Merc, Carmilla is the best Healer ingame and deals good damage, Jeon-Woo is better than Guan Yu (skillwise).
Dont get me wrong, I do not support that strategy. A skill like Vital seal is just brainless. In Pve, ok, let some weak players (no offense, players with low might) have a chance to seal a boss completely, but at least in PvP
it should not be possible, to seal attack AND magic a whole 2nd or 3rd row.
I agree, Vital Seal is a joke towards PvP. Merc's like Chironia and Riva are nothing compared to Taoist (The real OP Merc) I mean lets be honest Sylvie is great and flys, but doesn't the witch fly and is great too (If your not a InstruM that is... AKA
Mana Drain Main.
Honestly the only Broken merc I see after years of AO is: Taoist. because his Vital Seal and Spirit Echo are too much. First they make matchs last longer, Then they make Taoist to go back to past aka: Spike in 1 turn, Ok good job.
Sylvie is my next cannon merc, because I don't like Gigas or Goeman, I waited (and am waiting) Will be expensive those 70b I can imagine of price on Argos but... whatever.