For Zardnado, I would suggest Blazing Bloodzerker armor (toggled on) + Mornigstar Cross skill. A Thernda guest would be handy as well.
For Shadow Gogg, you can use Aeromancer's Robe (imbue toggled) + Warmaster's Burst (wind, sp). The mage build would the exact same damage, just for mp.
Queen Hybee... ok, that one is much easier to do as a mage. As a warrrior, the easiest way is either Angel of Souls + Bloodblade, or Werewolf Beast Form (for good light resists).
Mr. Frostvalverse (Void Battle) takes a bit longer, but it also gives more gold. With the new autohit ice sword and your Rage Beast, he should be fairly easy.
Armor Golem (from Morningstar Boss Rush) gives 1.663 mil gold, and is fairly easy to beat down with a harm weapon.
Edit: Oh, and in regards to changing the build.... Tbh, most of the BiS mage equipment is UR GGBs. It requires tokens rather than gold. There are non-GGB alternatives, but they're not much better than what you already have.
< Message edited by Primate Murder -- 8/29/2020 23:57:48 >