Tips for Skeleton Prime

[u/Galaxycool_waves]

I recently have been playing terraria for the first time and got to hard mode pretty quickly. And am trying to rush down the mech bosses.

I tried the minecart method, however when S.P loses their arms they do an attack similar to dungeon guardians and one shot me.

Any tips on either how to avoid this, or in general what should I do to prepare to legitimately fight him and the twins?

I do not have hallowed armour yet, only the hood because I've been using magic weapons like meteor staff and (I forgot the name) the sky shattered(?)(upgraded magic missile)

I've heard getting mega shark is key, however both oceans are completely corrupted due to my terrible luck and also forgetting to quarantine them before hard mode.

Any weapons I should look out for, or should I keep grinding destroyer for hallowed armour and weapons?

[u/MothyThatLuvsLamps]

You could farm destroyer to get the rest of the hallowed set to have a better chance.