First of all, you should get wings like Spectre Wings or Ghost Wings (whatever they're called). Next, you should set up a Slime farm and go find a bunch of stone to make Asphalt Blocks. Once you have enough Asphalt blocks, make a bridge across your ENTIRE world; unless you're really good at dodging a full-world bridge is pretty much required. Also use Hardmode accessories instead of a Honey Balloon.
You should use a Megashark with Chlorophyte bullets to help with aiming. Also, what weapons were you using currently?