maus is difficult to solo as mage, as long we have shield/aquaris proc we are invulnerble without either we die 2 hits.
this makes it hard to pull huge mobs, yes 1-2 hit we can but not when necro's put up their orb its certain death
soloing is possibel but is slow (since not to many mobs at a time due to dying issues), especially at bosses without mythic gun

however, i dont mind any of this, the game is ment to play together if just 1 tank joins to aborb hits you blast through it.
still many people play maus, so finding them aint hard maps that are at endgame lvl or above (dont know how exactly m5-6 scale) shouldnt be possibel to run easy solo, or at all imo
yes its from 61 expansion, but it still scales to lvl so its an endgame map imo

thats my 2 cents