That fitting makes me cry a little inside. You do know that you can fit some buffer too, rather than going pure active tank, right? And also, what's with the omni tank? Figure out where you're going to be and then tank for that area, instead of omni tanking.

If you're worried about being ganked, switch the rigs to Extender rigs instead, that'll give you more buffer. If you trade for a couple CDFE rigs and use PDS instead of SPRs in the low, you can get around 60k EHP to deal with ganking.

Here's a very slightly modified version of your fit that tanks better, hits harder, and will get you laughed at far less (and I will say that I agree with the use of drones, I use them on my Loki and it saves a ton of hassle locking all the frigs).

[Tengu, EHP]
Power Diagnostic System II
Caldari Navy Ballistic Control System
Caldari Navy Ballistic Control System

Invulnerability Field II
Republic Fleet Large Shield Extender
Magnetic Scattering Amplifier II
Republic Fleet 10MN Afterburner
Codebreaker I
Gistum C-Type Medium Shield Booster

Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Salvager I
Expanded Probe Launcher II, Sisters Core Scanner Probe I

Medium Core Defence Field Extender I
Medium Core Defence Field Extender I
Medium Core Defence Operational Solidifier I

Tengu Defensive - Adaptive Shielding
Tengu Electronics - Emergent Locus Analyzer
Tengu Engineering - Augmented Capacitor Reservoir
Tengu Offensive - Rifling Launcher Pattern
Tengu Propulsion - Fuel Catalyst

Hobgoblin II x10