What Am I Supposed To Do

I spent 20 minutes to get to the boss fight in ice barrows dungeon only to have the server lag out on me so badly that its crashes my game. Well thats 20 minutes of my life lost so I reboot and relax to try again, spend the 20 minutes getting to the boss, only to have it freeze the absolute second I step in. my fps from optifine says like 200 but I walk around the arena as mobs are frozen and attack the wall. I stand no where near them but my health drops as they attack the wall and I die. What am I supposed to do when I spend nearly an hour to do all this just to have the server shit on my face when I get to the boss?

 

you can either cry or report the bugs (if there is any) here

 

A: Belongs in questions.
B: Ask people to help you out. Preferably higher levels so they can carry you through the dungeon.
C: Move to a different dungeon that causes less lag.