Changes

Javelins with high elemental damage can be bought from vendors and supply a simple solution. With a shield that has good elemental damage, such as Tiamat's Rebuke, will leave you with less troubles. If you have many sources of elemental damage and especially charms, you can use the jab or fend skill to quickly deliver the damage to your foes. It will cost you some mana if you have boosted them to high skill levels, but it is a sure way of dispatching of physical immune creatures. Also, if it's possible to hit them with lightning damage, you can use Lightning Bolt, which reduces your physical damage slightly, but then converts all of the remaining physical damage into lightning damage.

Bowazons have several options for this kind of situation. First is one level Fire Arrow. Fire , Cold Arrow, or Magic Arrow, as it stands now is currently overpowered and converts most since these skills all convert a portion of your physical damage into fire damage (estimated to be about 50%). Therefore, with bows such as Eaglehorn cold, or Buriza, you can do a significant amount of fire magic damagerespectively. Second solution is to either max Immolation or Freezing Arrow. This is the elementalists' or frostmaidens' choice, usually. But the mana cost will be pretty hefty. It would be much better and less mana intensive to max Ice Arrow or Exploding Arrow instead and use those to kill your monsters. The last one is to use lots of elemental damage from charms, socketed bows that can be bought easily from vendors and socketed with elemental damage runes / jewels / gems, and other items, preferrably combined with knockback. In doing this, you force an enemy to keep their distance, while pelting them with elemental damage they aren't immune to. For example: Burizons However, this can just spam Guided Arrow and expect be draining on the arrow stacks. One final option, if you're on Expansion, is to use curses. Through the use of a good result as Guided Arrow pierces wand that has charges of amplify damage, or by wearing the amulet Atma's Scarab, you can inflict Amplify Damage on an enemy, which may reduce it's physical resistance below 100% (Immunity in order monsters is caused by having 100% or greater resistance). Another option, though you will occasionally find monsters that it doesn't work on, is to use the unique thresher, Reaper's Toll, on your mercenary, which has an excellent chance to inflict cast decrepify, slowing the target and reducing the cold damage multiple timesthey deal, as well as letting you deal more damage, and possibly breaking their immunity if they had one.