So I distillate this Fire Mage BOSS macro from the previous posts:

Code:
#show Fireball
/console Sound_EnableSFX 0
/use 13
/use 14
/use Mana Sapphire
/cast Combustion
/cast Icy Veins
/console Sound_EnableSFX 1
/script UIErrorsFrame:Clear()
/startattack
/castsequence [combat,exists,harm,nodead] reset=target ,Scorch,,Fireball,,Fireball,,Fireball,,Fireball,,Fireball,,Fireball,,Fireball,,Fireball,,Fireball
/cast living bomb
it has 361 Characters so which is to big for the normal <255 char Vanilla WOW macros. (but then I use macaroon)
/click can split it up as seen in initial post.

Thanks for all contributors.

Is there a way to effectively use the Instant Pyroblast (hot Streak) in a macro without pressing a different button ?

btw, since when do you need to press a button twice when using the /stopcasting command ?