The easiest way for me is to use Stormcaster's vest and Simple Bow, after using Slime Rune the ATT is 4 and can attack diagonally. Bosses do not always move and can be kited and shot. Have fun ^^
Thanks for the reply, dear developer. The stat preview of the Stormcaster's vest is missing though. Also I appreciated the character skin change depends on item, I found the ghost, mage, warrior and hunter skin so far.