A fellow Dragon enthusiast! Well, the Dragon is currently my primary mech and I've....dabbled in quite a few loadouts. I present them here for your perusal and hope that they will serve you as well as they have for myself.
FLAME
This was my first mech in Open Beta and I love it so. It has the speed and firepower to worry light mechs and the rugged armor to let it run right through a pack of assault mechs without dying (assuming you do so at full speed). Utilize your allies to their fullest potential as tanks while you swing around to the enemy's rear and blow the ever-living crap out of him. Remember, this mech is not one to go toe to toe with someone. It's an opportunist. Keep moving. I generally get first place in damage with this variant.
FLAME
My theoretical next Flame build. I find it a bit questionable as a mobile sniper because charging around at 104kph through buildings makes it hard to keep lasers on track. Still, the firepower isn't something to laugh at. Lasers hits to the rear also attract less attention than explosions.
DRG-5N
This was built to be something of a mobile sniper. It hurts quite a bit, but I think the lack of lasers hurts the flexibility of the build. In addition, even though it's just one ERPPC...it's still hot with repeated use. Which is why I graduated to the next build.
DRG-5N
This 5N is my most successful 5N build, the one I used mostly to fill out my pilot skills before jumping to the (clearly superior) 1C chassis. The Gauss Rifle of course can be used at any range....but I can't resist a good scrap, so I generally find myself at 200 meters or less to the enemy.
DRG-1C
You may see some resemblance to my first 5N variant. That is not a coincidence. The 5N was a throwaway mech for me, so I felt little need to upgrade it beyond double heatsinks. The 1C is permanent, so it got Endo Steel. With the weight savings, it has more armor and 3 lasers. Don't worry about the heat much. I tend to use the PPC up until the enemy gets to 100 meters, but there's certainly nothing stopping you from dumping a full alpha into someone standing still at point blank range (except heat).
DRG-1C
This is my current 1C build. I use it in a similar way to my Flame, but slower and more carefully. You have to guard that right arm and use alphas only as an emergency. I'm not sure it's optimal yet, but the variant is really just a stepping stone to...
DRG-1C
Your standard 4 LL toting dragon with added SRM bonus! It's hot and untested, so we'll see how that goes.
Anyway, have fun and don't take any bs from other people saying that it's a crappy mech. It's not. It's a
thinker's mech. Have fun!