Defeating Cynder
You have to fight Cynder (the really large dark purple dragon) twice. When you have to fight her for the last time, here's some tips:
She'll be flying in circles above you breathing fire. there are plenty crystals around there too.
1. Break them all and if your element meter isnt full to do a special breath attack, jump off the platform and die.
2. You'll come back with everything the same. Repeat step one until your element gauge is full.
3. Switch to Fire Breath, get as close to Cynder as possible and do your special Fire Breath attack (it does more damage if you've upgraded Fire completely)
4. She obviously would not be dead so keep using your earth breath (important to upgrade) until she is brought to the ground.
Note: It'll be easy to defeat her once and for all with the special dragon breath you acquire after.
Extended Combo
You can make your aeiral combo longer! When you press circle 3 or 4 times and knock someone into the air, immediately after the aerial melee (circle, circle, circle) press R1 to do a final headbutt even if the enemy falls down first. This is particularly helpful for the big apes with the staffs.
Get the monkeys of Spyro's back
After you complete Ignitus' training, you'll go to a really snowy place where you'll get your second power: to breathe lightning. Your lightning does little harm at first but if upgraded to level 2, you'll be able to drag your enemies around with it. Here's some advice. When near snowy cliffs with, like, 40 monkeys and birds, just throw them off the cliff with your lightning (which HAS to be at level 2 to work)