Ships & Modules

You should get a fitting tool like pyfa or EFT. Then you can hurdle around with what actually fits on your ship and what doesn't. Alternatively, some sites like battleclinic got very decent pve-fits (buried below horrid ones though), just don't blindly take one of the poorly rated ones ;)

Edit: Example-Tengu

624 tank against guristas, cap stable, 1000+ dps with rage and 5% implants. You may want to swap 1 of T2 rigors to T1 and change Bay Thruster to T2 for more range.

[Tengu, Mission Hamgu]
Caldari Navy Ballistic Control System
Caldari Navy Ballistic Control System
Caldari Navy Ballistic Control System
Ballistic Control System II

Kinetic Deflection Field II
Adaptive Invulnerability Field II
Gistum C-Type Medium Shield Booster
Phased Weapon Navigation Array Generation Extron
10MN Afterburner II
Cap Recharger II

Heavy Assault Missile Launcher II, Scourge Rage Heavy Assault Missile
Heavy Assault Missile Launcher II, Scourge Rage Heavy Assault Missile
Heavy Assault Missile Launcher II, Scourge Rage Heavy Assault Missile
Heavy Assault Missile Launcher II, Scourge Rage Heavy Assault Missile
Heavy Assault Missile Launcher II, Scourge Rage Heavy Assault Missile
Heavy Assault Missile Launcher II, Scourge Rage Heavy Assault Missile

Medium Warhead Rigor Catalyst II
Medium Warhead Rigor Catalyst II
Medium Hydraulic Bay Thrusters I

Tengu Propulsion - Fuel Catalyst
Tengu Defensive - Amplification Node
Tengu Electronics - Dissolution Sequencer
Tengu Offensive - Accelerated Ejection Bay
Tengu Engineering - Augmented Capacitor Reservoir

Damage application isn't really the main problem you'll run to in missions, it's range. You really want more range rigs and definitely T2 them. Also T3s are up for a rebalance and signs point to the Tengu offensive sub getting a nerf, so you might find your ship severely gimped in the near-ish future.

Nerf/boost from what I recall. I don't recall the specifics anymore but dps went down but your sig didn't get blown up using some of the T2 missiles which meant more speed tank.

Don't bother using HAMs for lv4's the range is crap. Just use a T2 bay loading accelerator and 2x t1 flares, a normal t1 bay loading accel does almost nothing due to stacking penalties.

HAM's are bad because you waste time (and thus dps) getting into range to use them.

[Tengu, Quick build 1]
Caldari Navy Ballistic Control System
Caldari Navy Ballistic Control System
Ballistic Control System II
Ballistic Control System II

10MN Afterburner II
EM Ward Amplifier II
EM Ward Amplifier II
Gistum C-Type Medium Shield Booster
Explosive Deflection Amplifier II
Shield Boost Amplifier II

Heavy Missile Launcher II, Scourge Fury Heavy Missile
Heavy Missile Launcher II, Scourge Fury Heavy Missile
Heavy Missile Launcher II, Scourge Fury Heavy Missile
Heavy Missile Launcher II, Scourge Fury Heavy Missile
Heavy Missile Launcher II, Scourge Fury Heavy Missile
Heavy Missile Launcher II, Scourge Fury Heavy Missile

Medium Bay Loading Accelerator II
Medium Warhead Flare Catalyst I
Medium Warhead Flare Catalyst I

Tengu Defensive - Amplification Node
Tengu Electronics - Dissolution Sequencer
Tengu Engineering - Augmented Capacitor Reservoir
Tengu Offensive - Accelerated Ejection Bay
Tengu Propulsion - Fuel Catalyst

Or use 2x T2 Rigors, 1x T2 Flare. Swap resist amps to what your fighting against, could also combine it with core augmentation 1 &2 and other implants so you easily fit hardeners or 1-2 more caldair BCU's for fitting issues.

Oh and train up your skills to at least 3 for the hull and the overheating specific skills, they are a great aset in a T3 when you bite off more than you can chew as you can overheat for a long time in a T3 thanks to it's bonus. I know in my Tengu which uses a small shield overheating will generally cost me less than 10k in repairs with how long I use it, so I use it in place of the ASB or a buying a better shield booster as a pithi-c is able to control almost everything without worry as long as I don't draw full room aggro. So your gistum c medium will just provide a lot more cushion when overheated if you do something stupid.