I started a new character and a new world.
I killed the eye first and got the shield. It's quite nice and I used it all the way up to post plantera.
Second I went for the Brain. It was a bit more difficult, but I built a large arena with wooden platforms to jump between and managed to kite it to death. At this point I had a meteorite land so I went and got the space gun and meteor armour.
I was worried about skeletron, but he wasn't as difficult as I was worried he might be. The first time I fought him I got trapped in his head as it spun, but the second time was fairly easy.
The wall was pretty standard, it gets quite fast but with a long platform and a mythical demon scythe it went down pretty easily.
The first mechanical boss I fought was the destroyer, after I'd gone and made a golden shower. It went down easily. I probably over-prepared for it.
I was going to fight Skeletron Prime last, since I thought he'd be a pain, but he spawned randomly one night and I killed him pretty easily.
The twins are the hardest of the mech bosses now, they took me four or five tries to finally kite them well enough. I used the Daedalus Stormbow with holy arrows for them which kept the fight short.
Plantera was a huge pain in the
. I had to build a large arena with honey along the floor and a heart statue set up on a timer to beat it. I used Chlorophyte armor with a Chlorophyte Shotbow and holy arrows. I also finished my Ankh shield before I beat plantera.
The Golem goes down like nothing, he's as easy as ever.
That's where I'm at right now. I've fought one martian invasion and got a couple of laser machineguns as well as a xeno popper. The cultists are slaughtering me, but I haven't really put much effort into fighting them. I killed the Golem a good 30 times trying to get my hands on sun stones. Right now I'm using a Celestial Shell, Celestial Stone, Destroyer Emblem, Celestial Emblem, Specter Wings, and Ankh Shield.
I'm really enjoying expert mode. I wish there were a few more interesting boss items, but what's in there is great. Next time I play I'm going to spend some time building a castle for my NPCs.