Oh how I love this ship. I was so excited when I first learned how to fly one, and after I bought my first one, it sat in the hangar for another month before I could T2 armor fit it. My first mega I took out had T1 medium guns on it, as I had not yet trained the large guns.
I am still slacking a bit on my skill with this boat as I still rely on T1 large guns for it and T1 heavy drones, but none the less I have beaten a many of ships with this hull, and I will add lost a few as well.
Megas are quit unique in that you can balance the tank to dps ratio on them or go all one way.
Here is an example of a solo PVP fit I like to fly with:
[Megathron, PVP]
7x Modal Mega Ion Particle Accelerator I (Caldari Navy Antimatter Charge L)
500W Infectious Power System Malfunction
Warp Disruptor II
Heavy Electrochemical Capacitor Booster I (Cap Booster 800)
Fleeting Propulsion Inhibitor I
Quad LiF Fueled I Booster Rockets
3x Magnetic Field Stabilizer II
Damage Control II
2x 1600mm Reinforced Rolled Tungsten Plates I
Energized Adaptive Nano Membrane II
3x Large Trimark Armor Pump I
5x Ogre I
Effective HP: 101,115
Tank Ability: 16.63 DPS
Damage Profile – (EM: 25.00%, Ex: 25.00%, Ki: 25.00%, Th: 25.00%)
Shield Resists – EM: 12.50%, Ex: 56.25%, Ki: 47.50%, Th: 30.00%
Armor Resists – EM: 67.70%, Ex: 41.86%, Ki: 58.01%, Th: 58.01%
Capacitor: Lasts 2m 50s
Volley Damage: 2,658.14
DPS: 667.02
There is another fit I like to use in fleet fights, this one allows a bit more rounded approach to supporting your fleet and staying in the fight:
[Megathron, PVP Fleet]
7x Modal Mega Neutron Particle Accelerator I (Caldari Navy Antimatter Charge L)
Large Remote Armor Repair System II
Sensor Booster II (Scan Resolution)
ECCM – Magnetometric II
Tracking Computer II (Tracking Speed)
Stasis Webifier II
Damage Control II
3x Magnetic Field Stabilizer II
Energized Adaptive Nano Membrane I
2x 1600mm Reinforced Rolled Tungsten Plates I
Large Anti-Explosive Pump I
2x Large Trimark Armor Pump I
5x Ogre I
Effective HP: 93,827
Tank Ability: 16.63 DPS
Damage Profile – (EM: 25.00%, Ex: 25.00%, Ki: 25.00%, Th: 25.00%)
Shield Resists – EM: 12.50%, Ex: 56.25%, Ki: 47.50%, Th: 30.00%
Armor Resists – EM: 65.15%, Ex: 54.83%, Ki: 54.70%, Th: 54.70%
Capacitor: Lasts 2m 6s
Volley Damage: 3,307.90
DPS: 706.83
As you can see just covering the basics on the mega, it is a very impressive ship.