Easiest way to tame a pheonix for me. Tame a pyromane, take otnto scorched, make a gene scanner find the pheonix build a trap, check youtube its easy, when it comes out spam bite attack, let it heal for a bit then spam again. Very easy. Im sure wyverns are probably good also but, its alot easier to get a pyromane then a wyvern. I did it with a pyromane and tamed it within 1 storm. Also bonus to this method. No need for armour or anything as the pyromane keeps you safe from the heat.