Complex sentence: Taoists are considered the hardest class to play, similar to wizards, taoists have "pet"-companions, which can be leveled during their lifetime, taoist companions originate from buyable skills instead of the taming of mobs in the game wizards are capable of.
Split into simpler sentences: Taoists are considered the hardest class to play, similar to wizards, taoists have "pet"-companions, which can be leveled during their lifetime. Taoist companions originate from buyable skills instead of the taming of mobs wizards are capable of.