So you want us to trick them into playing shitty out of meta classes that are barely useful even as heroes? OP, tyrants are definitely in the meta right now and by far the best melee dps. Daggers are buffed but they need a shitload of gear to be good. Also they aren't particularly useful in mass pvp. CPs have been looking for active paladins for their level 80 buff which is amazing. Other than that, bards are always mandatory for a cp, warcryer is good and offers unique buffs that nobody else can offer(most CPs use them as boxes though). To be honest most cps on the server are melee dps cps. Gladiators are good but completely lackluster on mass pvp. To be useful you need to have a dedicated recharger behind you and orfen 3 for sure, even then they can't compete with the versatility and mobility of tyrants. Warlord is completely out of meta now that everyone has stun resist gear and chant of spirit/song of puri. Titans got nerfed hard on zaken with the cooldown increase on superspeed pots, that means that you will have issues reaching your opponents in order to hit them. They desperately need rush, but I think they get it on antharas. Mages are really good for pvp right now but farming giants cave with them is much harder than with melee dds. This is one of the reasons a lot of people rerolled from mages to melee on zaken. Then there are summoners which are kind of unique, better for players who like to play solo and WK/ES can farm with infinite mana. That is about it, EE is being used as a backup support in a lot of parties. Bishop is mandatory in my opinion. I don't really like SE but some melee setups use them for root and stigma, also for backup heals.
I suggest you play whatever class you like. You can always reroll later on for 20 euros.