Before I begin there is no set right and wrong way to build ships. Some builds are less optimal than others, but that can be subjective.
There's also the factor of open or solo play. With solo play builds you can get away with way less shields and armour and fly what I would consider a paper thin build. If you fly paper thin builds in open then one day it will catch up to you and your ship will be greeted by the rebuy screen in a matter of seconds. Worth noting that non of your builds above are what I would consider paper thin.
That said, lets get into some technical build discussions...
One thing that's common between your builds is super cruise assist and the docking computer. Personally I do not get why people use these, they are slower that doing it manually and can cause your ship to go boom on a station wall. many a post of such mishaps happening. They also take up 2 valuable slots, which going back to open/solo play, can make a huge difference when flying open only.
Armour:
I like heavy duty reactive armour and a thermal resist HRP, which you have on your builds. For the thermal resist HRP it's best to use the smallest possible slot, ideally a class 1.
If your HRP is class 1 then Thermal Resist + Reflective plating is best.
If your HRP is a class 2/3 or greater then thermal resist and deep plating is the way to go. This isn't set in stone and is a rough guideline. You can play around on EDSY to see what works best.
Ideally you want all your hull resistance boosted to 30% or more.
Again open vs solo builds slightly differ with armour, not just the strength but also MRPs. With solo builds there's very little need for MRP, there are some edge cases, but in general you can get away without them. In open I would always use 2 or 3 where possible.
Shields:
Your builds all use bi-weaves, which are then boosted by guardian shield reinforcements. Your shields are around the 2k mark, which are great, but overkill for Haz Rez and PP. Personally I would aim for just above 1k. Enough to take a beating if you get ganked in open before you high wake away. Remember, it's not worth taking on a full engineered murder boat in a PvE specced ship...you will lose 99% of the time. Safe just to leg it.
Optional:
For HazRez you just need HRP, MRP and a shield. Who cares about limpets or cargo rack etc. However, for PP having a cargo rack and even an operations multi limpet can be very beneficial.
For me I have multiple dedicated HazRez/CZ/Mission combat ships and then I have a couple of PP ships that have less shields and armour, but are more capable of doing PP tasks while you move between systems. Some people just a a one ship fits all...and that's ok if it works for them.
Sensors:
You have A rated sensors, with wide angle engineering (not really found a use for this engineering). A rated are heavy and power consuming.
The only ships I really use A rated on are my miner and my thargoid collector ship. A rated, long range mod. This allows me to see any players sneaking up on me before they see me. Every other ship I have uses D rated, long range, which is considered the standard class and engineering for most scenarios.
Fuel Scoops and FSD Boosters:
These are only needed when jumping to many systems , one after the other, without docking. Handy for going a few hundred Ly, but the FSDB only saves you a few mins. I don't have either on dedicated combat ships. On my PP ships I do have a scoop, but since I'm not jumping hundreds of Ly the FSDB is not really required.
Weapons:
This is such a personal preference for each Cmdr. Really depends on what you like using and your system of combat, ie are you a long range sniper or do you like to get in close and see the fear in the pilots eyes before their ship goes boom.
I prefer close qtr combat, <800m, and sniping modules (usually the power plant)
Weapon loadouts would require an entire other thread and is super subjective. For my CZ/HazRez ships I perfer gimballed MCs and Beams, all short range mod (best dps).
Now that's out the way, here's a tweaked build from your 3. Capable of HazRez, CZ and PP in open. There's no way a ganker will chew through your hull before you can escape.
EDSY is a ship outfitting tool for Elite Dangerous
edsy.org
My open mode Cobra Mk5 dedicated PP ship:
EDSY is a ship outfitting tool for Elite Dangerous
edsy.org
, I was also considering more rails + fuel tank or something but wasn't sure how many I could run at once or what other good weapon choices would be to complement it, maybe 4x rail in the 2x version above replacing 2x beams?
