I'm going to add another era topic to the collection since the past is always of interest to me.
With each big upgrade a new era ensues , I just want to name what class got the biggest advantage during these era. Wether through personal skill level or just luck just type what era made each class the strongest.
In my opinion, the rofd upgrade made this class the most dominate. With the removal of ctrl minor rogues had to find another way to empty out their mana pool. Then enters double minor, although slightly known in KE it wasn't really used due to the fact ctrl minor was so dominate . I myself always chose the hp/minor method over the ctrl minor , but had to move to double minor ( at least for 1 v 1s with rogues and extreme tanking situations). All of a sudden rogues 1v 1 would last for hours ( even when both had immaculate combos). One vs ones between rogues started being dictated by who could control their minor the best. Although it restricts movement a bit in pk it started making a lot of rogues tanks in small party situations. I remember when every video had a rogue tanking 4-5 people solo. This time up until the Forgotten Frontiers Expansion was ,in my opinion, when rogues were at their best.
( I have no opinion on archers ,lol)
I would have to say Warriors became most dominate the day Forgotten Frontiers was released. With sins being their number one competition ,next to priests, for tanks of the year warriors had nothing to worry about. Sins were finally limited to their true purpose , hit and run. Warriors soon became the only true tanking melee class of the game and are now unchallenged in that respect.
Although I have never actively played the priest class I would have to say they became dominate after the rofd expansion. Nothing could top Helis when it was added to the priests skill lineup. Just watch AHM int priests if you don't believe me.
Another class I've never really played, but I'll throw out an opinion anyway. This class truly only scared me after the Moradon patch. Ice Mages got a HUGE BOOST effecting pk in a great sense. I remember there being topics all over knight online forums asking to reduce the icing rate of success . It can also be argued that the Rofd patch was the dominate phase, just because of the 72 staff attack.