I can pass on some theories I use to build my combat ships. Especially the iChief:
1. Use a 6C Bi-Weave shield. I put Reinforced w/ fast recharge. The iChief's shield modifier is low. In any decent fight your shields will likely drop. The recharge rate of B-Weave is more beneficial than some extra shield strength up front.
2. Because you'll use Bi-Weaves you should put one HRP, and two MRPs in the military slots. When your shields do drop the MRPs will help to protect your canopy and weapons. You can use engineering on your hull to help with that, where MRPs are the only way to protect your modules.
3. I primarily use gimballed Pulse Lasers and Frag Cannons. I can fly evasively, and stay on target at the same time. While the efficient w/ Phasing or Scramble fire away, almost constantly, I can drop spike damage with the frags w/ Overcharged as the opportunity arises. I find this to be a great strategy in such an agile ship.
4. Use a Charge enhanced PD. This will go a long way to keep your lasers firing. The idea behind my build is being able to keep near constant laser fire on your target, and use the frags to strip hull points rapidly.
5. As mentioned above, the agility of the iChief is it"s major attribute. Use it. Of course attempt to stay out of your target's firing arc, but if you do find yourself face to face, use your thrusters to avoid a head on approach. Keep moving in at least two axis at all times, unless your target is flying directly away from you. This will mitigate your incoming damage.
I wish you success with your iChief. As a qualification, this relates to PvE only. I am pretty successful in RES and CZs using the advove advice.
Fly crazy Commander. o7