TL:DR Mesmers are not OP or UP. They fix exactly into their niche. They’re meant to be duelists. Duelists don’t fight wave after wave after wave of monsters – they fight people. They 1v1 extremely effectively. This is why they’re weaker in PvE. But they’re still very strong in PvE and can run through everything when you adapt to the situation.
I apologize for my massive wall which contains a lot of reiterated themes but this is so because it is somewhat difficult to describe. I hope I did an effective job at doing so.
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I see people saying mesmers are OP/UP/too hard/whatever else. The main point I see is people are complaining that Mesmers are too strong PvP and too weak PvE.
Mesmer -> I can see where people are coming from with their complaints. However, the way I see it is that the Mesmer is similar to the Elementalist in that it is much more difficult to play than the other classes. The general consensus seems to be that Mesmers are too strong in PvP and not strong enough in PvE. Thing is… it makes sense that it is this way. Mesmers are supposed to be THE duelist profession. Thieves are a spike-out class but not a duelist.
Duelists engage in combat, usually 1v1, and can maintain themselves for a good long while and deal significant damage while not taking very much.
I don’t know about anyone else but I play a lot of League of Legends. Mesmers remind me a lot of Fiora, a duelist champion. She has great sustain, an ability that blocks the next incoming attack, and a lot of sustain damage. It makes sense that she’s really good at fighting other champs. She is not very good at jungling though. Mesmers aren’t so good at it either and it just makes sense. Mesmers are meant to duel people by messing with their heads. You’re supposed to attack the wrong clone while the real Mesmer deals significant damage to you. You can’t do that to a computer that knows which one is real and which one isn’t. The computer isn’t another player, and isn’t really gonna duel you unless you’re fighting a vet or champ 1v1.
Speaking of League of Legends, if I had to associate each class with a champ they would be as follows:
Warrior -> Darius/Garen/Lee Sin/Mantheon/Udyr. Get in, tank some dmg, walk away with a kill. Notice, these are good at killing champs and jungling.
Guardian -> Taric/Volibear/Shen/Mao/Galio/Alistar. Can kill you, but are tankier, more about outlasting you than getting in a murdering you quickly. Notice, also good at killing champs and jungling.
Thief -> Akali/Talon/Poppy/Rengar/Shaco. Designed to kill you quickly and are extra squishy in comparison to others. Notice, great for assassinating champs and generally good for jungling.
Ranger -> Jayce/Riven. Mostly Jayce but I wanted more than 1 example. Jayce obviously because he is the epitome of “jack of all trades.” Ranged when he wants with loads of damage, vs melee when he wants. Notice, good for everything as well. This example isn’t the best because ranger’s probably the most difficult to place, but rangers are definitely great for PvE and PvP.
Necro -> Swain/Yorick/Brand/Cassiopeia. Designed to be very high damage and not super tanky but still able to hold their own. Notice, also great for both PvP and PvE.
Engineer -> The obvious Heimerdinger. Can deal lots of up front damage or can set up devices to do the dirty work for him. Notice, great for whatever he wants to do.
Elementalist -> Annie/Anivia/Zyra/Ziggs/Fizz/etc.. Lots of damage output and not very tanky. Take Fizz for instance – very hard to play without getting completely rolled. Notice, great for PvE, especially with a bunch allies to group enemies for you, but also good for PvP because of the assassin-like qualities of the daggers.
Mesmer -> Fiora/Jax/LeBlanc/Syndra. Relative to Fiora and Syndra, much more difficult to play. Timing Fiora’s riposte to effectively protect yourself while damaging the enemy.
The overall point is:=:=:=:=:=:=:=:> Mesmers are hard. They’re more of an assassin type than an Elementalist type. As a Mesmer, you have to work harder in combat, but the rewards exceed that of the Elementalist.
Mesmers are the rangers of magic. Rangers run around with pretty much any weapon they choose. Mesmers are similar because Mesmers can apply boons to allies, remove conditions from allies, teleport, create portals for allies, invert enemy ranged attacks, cloak, cloak allies, spam conditions, evade nearly all damage temporarily, morph an enemy for 10 seconds, summon allies to tank for you, use very long range, use melee.. am I missing anything?