Terraria: Mostly surviving the lunar pillars... mostly

Ok the hardest thing of the lunar events (Besides killing the cultist and moon lord) are the pillars.
Solar (Melee), Vortex (Ranged), Stardust (Summoner), and Nebula (Mage).

The strategy for each depends.

Solar: The bane of any ranger. The Selenians (The duel sword welding guys) when spinning reflect ANY bullet or arrow you shoot... if you are using chlorophyte bullets... you will die by your own bullets/arrows. You get the idea at this point. Some sword projectiles are even deflect-able!
Good weapons are: Yoyos/flails of choice, any returning projectile (Possessed hatchet which does melee damage, boomerangs, etc), magic (untested).

Vortex: The real danger is the gravity altering effect the alien queens cause. Basically you can't move up or down and only left/right... leaving you open to getting shot at by the other enemies. At most it lasts a few seconds thankfully. Ranged is the best bet to taking them out. Summoners would do well too being able to keep a good distance while dodging.

Good weapons: Any good machine gun (Megashark/uzi at this point or gatligator), pulse bow/any good bow with good ammo of choice (Tsunami, etc), any good summon of choice.

Stardust: This one has the BIG problem of stardust cells. If said cells are not killed fast enough (the little ones) they turn to big ones... no wonder they are the infection of the galaxy. Kill the cells with enough dps of choice (Megashark + crystal bullets fare really well here or good damaging magic).

Good weapons: Any high dps magic weapon of choice, Machine guns + crystal ammo (the shards do even more damage!), any high dps weapon really.

Nebula: The problem is the really high damage output of the enemies. Again, more dps is the best option.

Good weapons: Any high damage autofiring/autoswing weapon of choice that can be sustained for a LONG time (with sufficient ammo if applicable). The key is really good dps. Anything homing really helps (Chlorophyte bullets, rockets, summons etc). Dodging is really important due to the shear damage they do. The solar pillar is the only one worse than this but when they get close.