So recently i was going to buy a bundle for my birthday and i was wondering which one is the strongest for a lvl 20 wizard Arcane builders bundle Winterbane Gauntlet Evergreen bundle Atlantean Bundle
I think it really depends on what you want. Something like the evergreen bundle is more focused on gardening and activities, whereas the gauntlets are focused on the dungeons they come with. I think it all depends on which you think looks the best and would enjoy the most. As for strength, it depends what kind of stats you want to match your playing style, whether that's damage, defense, or a balanced gear set.
Oh, also it could depend on how much you care for the pets. Some of those pets are amazing if you spend the time on them, it just depends on your playing style, school, and what you would enjoy most.