@Spiritual Guardian: The Warrior-Mage gap has, obviously, existed for a number of years and clearly remains in a much more limited sense today (though that is a tangent I will leave for a thread relating to that topic). However, just relating to your following point:
I won't say anything else on this subject, so you can believe what you want to believe. I just don't like seeing myths or half-truths being passed up as facts, which screws over some newer players when they find out the truth themselves.
When dismissing the guide earlier, you forgot to mention that the assumptions and many of the items listed on that comparison are also paid content. You're dismissing the list on the basis of a difference between cost in one part of the formula when, in fact, there are many. You're going to be paying out of your way to reach the potential damage listed on that guide anyway, which somewhat reduces the importance of the cost difference between Dunamis/Thernda/Poelala.
Another point to make, and this is somewhat nuanced given not everyone is able to afford paid content: The difference in damage output between Warriors and Mages can become arbitrary very easily. To put that into context; If I deal 12000 damage as a Warrior and 13000 damage as a Mage vs a monster with 10000 HP, I'm still going to end up killing the monster either way. Relating this to the main topic of this thread, GGB extravaganzas both past and present have made arbitrary damage easier to achieve over time. In the past, we've had Arms of the dragonguard and prime chaos orb this year.
I think the real discussion we should be having (on a separate thread) should either be the FO/FD gap or the Mage-Warrior/Ranger gap. FD and Ranger builds are far less versatile than both Mages and Warriors due to relative equipment shortages (especially when items only toggle melee/magic and forget ranged). Thankfully, we've been seeing more Ranged/Magic toggles recently (infinita staff for one). Perhaps we should be asking for more Melee/Ranged toggles too.