Don’t go condition on scepter, fire condition + some bleeding on earth, hum? Such a waste.
You can actually burst with scepter but you need to get I believe lvl80 first to actually start thinking to what to do with it. It’s a complex class and traits as waepon used will change totally the way you can approach the fights. I’m using S/D as the scepter itself gives a great amount of damage in fresh air. What I would recommend to have at least is :
lvl30 in Air : Swiftness and fury on aura, endurance on channeling, recharge air attunement on crits
lvl20 fire : burn on crit, DC reduction on spells fire
You can actually use the following basic combo without having to get in range, preferably to use as a finisher :
AIR : 2,1,3,5
SWAP
FIRE : 2,5,3
→This makes tons of damages.
SWAP
Air and chain swap elements until fire is back. I mean : Start channeling 1 then change attunement so that the channeling will crit on other attunement than air to switch back on it and get the lightening bolt proc.