This question is a bit vague, I don't have specifics. What gods am I against? Who am I playing with (the actual players)? What are those players comfortable on? A MOBA as so many aspects to it that it makes a question like this difficult to answer without any context. Even if bans off the table this question is difficult. If we look at the current META in the patch, right now this is probably what I think is strongest baseline lets say its 5 good players playing who know what every god does and can play them well.
Solo Lane: Ra
Ra does not die, you build gladiators shield and phoenix shield and suddenly you can rotate out of lane and get objectives for you team through the use of your 3. You never die because of your healing in kit and from your items. You do absurd damage and have short cooldowns because of how the Cooldown rate system works.
Jungle: Fenrir
Fenrir has been the only strength based character that has been strong for the entirety of SMITE 2's life span. The god is good and can flex into 4 roles, He can build full damage, he can go full tank, he can do a mix of the two. He is so flexible you be hard pressed to find anyone else who can do more in terms of build than him
Mid: Zeus/The Morrigan
I say two picks here. Mages are strong, CDR is really strong , Zeus does insane damage and just kills people so fast. If Zeus lives any fight you win the game its that simple.
The Morrigan is on here because if you can play her you can dominate a game. You can be any of the gods on the map for a time and use their relics. Fenrir is an amazing transformation for her.
Support: Yemoja
This god keeps getting buffs she doesn't need and is very very good. She can solo carries in the late game. She has healing shielding and player made walls. Insanely fast map movement and very high damage. Yemoja can keep Zeus safe and is a good transform for The Morrigan.
Carry: Jing Wei/Zeus
Jing Wei is safe, can keep a carry player safe and does really high damage in the late game.
Zeus is on here because you can build him basic attack based because he is absurdly strong and can explode people anyway. If Zeus lives any fight you win the game its that simple