Terraria Community Forums

That's definitely enough. Just maybe add one more to whatever tier might be lacking it.

Here are the tiers I used:

• Forest (1)
• Snow (1)
• Desert (1)
• Fishing (1)
• Shadow Orb (2)
• Floating Island (1)
• Jungle (2)
• Dungeon (1)
• Underworld (1)
• Night's Edge (2)

That's not really tiers, I meant like progression (preboss->eye->orb/evil boss->queen bee etc...)

Those do fit in all the tiers though, so I guess it's fine.

Progression-wise, this is how it shapes up to me.
Preboss:
Forest turret, Snow turret, and desert turret
Orb/evil boss:
Fishing turret, floating island turret, Demonite & Crimtane turrets
Pre-hardmode:
Jungle turret, hive turret, dungeon turret, underworld turret, night's edge turrets.

What's the night's edge turret called?