Man, animal growth an nature's avatar
You've got to take wild spell, and then you've got to get yourself an advanced dire bear or a roc, with a lot of barding for the bear, or something like that, wild shape into something similar, cast summons like crazy, then animal growth, which will give you and your animals great enhancements to str, con and NA, and DR 10/Magic. Then you cast nature's avatar on yourself and your companion, which gives a +10 to attack and damage, and 1d8 hp/caster level, averaging about 76 extra hit points. After that, you just use boosts on yourself like cat's grace, bear's endurance, bull's strength. Now that is laying downth the smacketh

. Or you could just cast several elemental swarms and, or firestorm, since you said you were into burning stuff

, with maximized or empowered flamestrikes in between. That's off the top of my head, since I don't have the books here with me right now. Now look at this example. You're in the forest, shapechanged into a jaybird or something like that, and your enemies are unaware of you, since you found out about them using commune with nature, and you start raining flame strikes on them, and they are like, where the **** are those flame strikes coming from

. That's what the the druid's ultimately about, casting while shapechanged.