Top 5 for effectiveness in a Battle-Square/Emporia Setting; (Disclaimer, all these classes are judged on when you acquire the recommended gear setups. Combining it with skill for maximum performance. Reaching these potentials can be very expensive and requires good practice.)
1. Summoner
2. Invoker
3. Sorcerer
4. Destroyer
5. Sentinel
Runner ups; (Not great but still good choices. Consider them 6-8. Or all tied for 5-6.)
Twin: Mostly from nerfs ruining their safety net somewhat. Still highly mobile, great crowd control, amazing vs fast targets like archers.
Savage: Easy to learn. Good Super-armor safety. Amazing ground stuns. Great mobility.
Ninja: Good mixed damage/crowd control. Wood Rush is nice to have. Highly mobile but more durable than Sentinels.
Now let's go over them. I'll explain why;
5. Sentinel
This is up here for Support reasons alone. Telsa coil, Freeze/Silence/Jump&Dash Block, good chain combo stuns, netbind. Pair this guy with a good mage and watch things get trapped and stuck so easily. Absurd movement speed means you can make up for your paper-thin survivability when caught by being incredibly annoying.
Damage wise is their con. Only with some real element build or Solar investment do you really see the damages.
4. Destroyer
Opposite of the spectrum of Crowd-control vs Damage is Destroyer. Like Sentinels, they're highly mobile. But sacrifice some for core stats like Attack Speed, Critical Chance and Critical Damage. Raw attack wise they can pack a punch. Sniping crits, good x-spam modifiers for single-target vs multi-target, good burst skills makes this a great class for DPS.
As I've said on Crowd Control side. They're lacking. Unless you wanna sacrifice a ton of damage for chain crowd control stun through X>Down+Z>Z.
3. Sorcerer
By themselves they have to pray for aid in catching sometimes. But this is a list for team performance baby! Amazing group crowd control. Arcadia removed PoS full-set necessity so good movement speed is possible again. Element damage applies to their skills now so they're surprisingly painful. However they're less durable than Invokers healing wise but more-so defensive wise.
2. Invoker
Magnets, Quagmire, Barbarians, Heaven's Wrath. This class screams crowd control.
Good element damage and attack speed? X-spam away!
No more PoS needed? Go mixed MS/AS!
Amazing healing also.
1. Summoner
Max DPS. Even without elements.
Good solo crowd control through chain combo stuns and rolling stone.
Some safety when caught due to Golgon knockback/stun.
Amazing team-compatibility with any ground-based class.