For death knight :
Only tried this on scape, and it works
1. Go to a DK trainer
2. Reset talents
3. set on frost presence
4. go to blood talents tab
5. rank up 5 times the talent that gives Ap every 180 armor
6. set on blood presence
7. reset talents
8. do the same starting with point n.3, it stacks, and u get about 400-500 ap every time
Warrior:
1. Go to warrior trainer
2. rank up 5 times in the talent that gives you attack power for armor
3. put all your gear in backpack or bags
4. reset talents
5. put your gear back and rank up 5 times on that talent