[3.5] Fireball Ignite Trickster - League starter - Shaper Down

Seen mathils take on this build with totems casting scorching ray for ya. So how do you fight bosses just shoot fireballs to ignite and switch to scorching ray for 4 seconds while that ignite lasts? Also can any of the new skills possibly be used in place of scorching ray or like flameblast or incinerate perhaps? Definitely casting a channeling skill yourself is the way to go since trickster ascendancy buff you gain frenzy or power charges per second while channeling.

Great build for start. Looks a little bit slowly berfore you take GMP in Act 4. After that we have very fast map cleaning.

Trying this now. Mana is a PITA leveling. Any thoughts on mana sustain?