I tried it out. Gotta admit, it looks pretty damn epic. Just like I told you it would :P.
The damage "problem" is that #dmg is not a valid spell modding command, it just makes it default to 10 damage. #damage however, is very valid command for spell modding.
I also suggest you remove the empty flightsprite from the first spell (give value -1), since that is the reason for the pause between the casting and the graphical effect. The game actually takes the time to make the invisible missile fly to the target.
Also, I really don't see any reason for so epic damage. Since the troops in "ground zero" get hit by all of the spells, they'll get hit for quite a lot of damage (especially if you have all of the spells AN). I suggest you do 3 damage effects, first is AN (the laser itself), second AP (the fire explosion), third normal damage (sharpnel) the rest of the spells could do some minor fatigue damage (smoke, heat, falling down to ground, etc...)
Also, in future, would you mind using the code tags when posting long lists of code. Like this:
Code:
#newspell
#name "Orbital Blast6"
#descr "BOOM"
#school -1
#researchlevel 0
#path 0 0
#pathlevel 0 1
#effect 2
#fatiguecost 10
#flightspr 10000
#explspr 10188
#dmg 5
#aoe 663
#spec 128
--nextspell "Orbital Blast5"
#range 200
#precision 0
#end
#newspell
#name "Orbital Blast5"
#descr "BOOM"
#school -1
#researchlevel 0
#path 0 0
#pathlevel 0 1
#effect 3
#fatiguecost 10
#flightspr 10000
#explspr 10188
#dmg 40
#aoe 666
#spec 128
#nextspell "Orbital Blast6"
#range 200
#precision 0
#end
#newspell
#name "Orbital Blast4"
#descr "BOOM"
#school -1
#researchlevel 0
#path 0 0
#pathlevel 0 1
#effect 2
#fatiguecost 10
#flightspr 10000
#explspr 10140
#dmg 10
#aoe 10
#spec 128
#nextspell "Orbital Blast5"
#range 200
#precision 0
#end
#newspell
#name "Orbital Blast3"
#descr "BOOM"
#school -1
#researchlevel 0
#path 0 0
#pathlevel 0 1
#effect 2
#fatiguecost 10
#flightspr 10000
#explspr 10110
#dmg 50
#aoe 20
#spec 128
#nextspell "Orbital Blast4"
#range 200
#precision 0
#end
#newspell
#name "Orbital Blast2"
#descr "BOOM"
#school -1
#researchlevel 0
#path 0 0
#pathlevel 0 1
#effect 2
#fatiguecost 10
#explspr 10110
#flightspr 10000
#aoe 100
#dmg 99
#spec 128
#nextspell "Orbital Blast3"
#range 200
#precision 0
#end
#newspell
#name "Orbital Blast"
#descr "BOOM"
#school 2
#researchlevel 0
#path 0 0
#pathlevel 0 1
#effect 2
#fatiguecost 10
#flightspr 10000
#explspr 10242
#dmg 99
#spec 128
#nextspell "Orbital Blast2"
#range 200
#precision 0
#end