Ok, I've beaten lvl 26 on normal ok? So, I'll share it with you...
Ok, your COs should be as folowing:
Jake (1st front)
Rachel (2nd front)
1st, make a few infantry, but have a T copter as well...After that, make more infantry, and a B copter while other infantry who haven't been picked up capture bases, and com towers..Repeat until you have the whole south end captured...This is vital, cause you will get most of your money here...
At the second front, set the computer to genreal, but after a few days, change them to Assult, you do not wanna start assult, or your units will be snapped...
Just keep making more powerful units as you go, until your cpu has destroyed ALL black crystals...You will have your tag...This is the time to strike, blow up any oozium in your way and head for the Grand Bolts weak spots. Keep sending more renforcements becuase it will be spawning ooziums every 6 turns.
Make sure you eventually have enough money for a few bombers and a stealth. You should be able to defeat Von Bolt, only if you can keep your units untouched by the oozium...so bring some rockets, to defend your HQ..
good luck
Yeh, but the worst thing and you'd better prepare yourself.
First of all press yes when it gives you the choice of shoot the chair, secondly get ready for a very long a credits and get ready for map flashbacks. I know it takes a while but it gets you Hawke