[Xargon]

Hm, when I did Typhon with my conjurer on normal/epic, he was a joke. My experience on legendary so far with beefed-up Typhon:
- once he targets you, run and wait until he targets one of your pets again (summon pets directly after one of his attacks missed if they are dead), because some of his attacks mean instant death
- watch out for his life-stealing attack, it hits you no matter where you are (died once cause I felt safe behind him...)
- watch out for his thorns... being a conjurer means you probably deal lots of damage (I went for massive fire staff damage + ternion... insane against groups of monsters), which means lots of damage on yourself while his thorns are active...
- have some mana potions handy or be prepared to leave the summit every now and then, as his mana burn attack can make the battle lengthy otherwise

and yes, at least on legendary you'll have to resummon your pets frequently, Typhon does lots of damage (far more than any other boss, like Hades... probably the only creatures that keep up with him are dactyls)