User blog comment:KickMeElmo/Pumpkin Moons - Arena building and Ranger strategy/@comment-24021074-20131110172052

Another way to build up an arena: Super Dart Traps, Spikeball Traps and Flame Traps. :P Build a skybridge not too far from ground, put spikeball traps there and stay up. Dodge Mourning Wood attacks (projectiles that can go trough blocks) with wings and kill Pumpkings. Honey, campfire, heartlanterns and heart statues help.

I suggest to try it if you have those traps (you get them from jungle temple) sometimes I can reach wave 15 solo. (Actually once... But well it's possible :D)