I agreeWithout the help of the Solar Powers, a Terrarian can't last for long
And in what universe is "homing projectile that never stops chasing you and can go through walls and doesn't disappear when it hits you and can't be destroyed" considered "fair"?For aesthetics and difficulty of the actual pillar, I like the Nebula the most. It's a nice, pretty purple with tough enemies that aren't unfair like some enemies *coughCoritecough*.
And in what universe is "homing projectile that never stops chasing you and can go through walls and doesn't disappear when it hits you and can't be destroyed" considered "fair"?
This is why I love mage, and the Nebula pillarEnemy-wise, Stardust because its the only one that can be called 'Not Unfair enough to hate'.
Design-wise, I'd have to go with Solar. The Meteors in the background remind you of when Meteorites landed in your world, and all the enemies have very reminiscent of enemies you've encountered, even in the beginning.
Loot-wise, Nebula easy.. the armor is OP the weapons are powerful, and slip mages back into the 'Most Powerful/OP' class.