Boss advice: Hit and run tactics, but a litte bit more indepth for each weapon type: Sword - Usually the knockback should be enough to avoid the hit, but go back a few steps to be safe. Look for where he teleports in order to avoid a surprise attack. Dagger - Run up and hit about 3-4 times before backing off. This will give the most damage output while avoiding being hit. Staff - The easiest, but also the longest of the three. Run, shoot 3 times, run a bit, shoot 3 times, spam special, and it's a cake walk.
I really enjoyed this game, had a lot of fun going through it trying out each weapon type. Overall my only complaint would be the hitboxes, especially with flying enemies.
I wish there was a way to separate 2 copies of an item, i.e. if I had two Hell Hunter's sets, I wish I could put my Muurnin Runes on one set and my Perliris runes on the other. It would be nice so that both sets could have runes that do more damage to their respective classifications
A tip for run to the hills, get one person to the cliff and then start running with the other character (making sure he hasn't died), keep repeating and you will finish the level.
 "Zombie And Juliet")
 "50 years (graphical)")
 "Dawn of the Dragons")
 "ESCAPE")
 "Strand"){kind=icon}
 "Bloons TD 5")
 "A Knight's Story 2")
 "Reactance 2")
 "Nuclear Outrun")
 "Everybody Edits Push-Out!")
 "Zombie Misfits")
 "Co-operation")
 "Bloons Tower Defense 4")
 "Thing-Thing Arena 2"){kind=icon}
 "Tyrant")
 "CycloManiacs 2")
 "Hexiom Connect")
 "DuckLife3: Evolution")
The actual first, but still, no.