The Guardian is by far the most commonly used logistics ship for armour gangs. As you'd expect from an Amarr ship, if offers a heavily low slot biased layout of 6/2/5 and by far the strongest powergrid, offering it the capability to fit a fierce armour tank as well as substantial repping power. The Guardian also receives 25m3 of drone bay and bandwidth, enough for a flight of light drones. As a dual logistics ship, the Guardian receives bonuses to remote armour repairers and energy transfers, as well as rep amount for armour rep drones.
Source: http://www.evealtruist.com/2011/10/know-your-enemy-logistics.html
The Guardian is the first vessel to feature Carthum Conglomerate's brand new capacitor flow maximization system, allowing for greater amounts of energy to be stored in the capacitor as well as providing increased facilities for transporting that energy to other ships.
Developer: Carthum Conglomerate
While featuring Carthum's trademark armor and hull strength, the Guardian, being a support ship, has limited room for armaments. Its intended main function is to serve as an all-round support vessel, providing the raw energy for fleet compatriots to do what they need to do in order to achieve victory.
Logistics Cruisers Skill Bonuses (Per Skill Level):
15% reduction in Remote Capacitor Transmitter activation cost
15% reduction in Remote Armor Repairer activation cost
Amarr Cruiser Skill Bonuses (Per Skill Level):
150% bonus to Remote Capacitor Transmitter range
20% bonus to Logistic Drone transfer amount
60% bonus to Remote Armor Repairer optimal range and falloff
Role Bonus:
65% reduction in Remote Armor Repairer powergrid requirement
50% reduction in Remote Capacitor Transmitter powergrid requirement
[Guardian, New Fleet] Internal Force Field Array I 1600mm Steel Plates II Multispectrum Coating II EM Armor Hardener II Shadow Serpentis Armor Thermic Hardener 10MN Y-S8 Compact Afterburner Conjunctive Radar ECCM Scanning Array I Large Coaxial Compact Remote Armor Repairer Large Coaxial Compact Remote Armor Repairer Large Remote Armor Repairer II Large Remote Armor Repairer II Large 'Regard' Remote Capacitor Transmitter Large 'Regard' Remote Capacitor Transmitter Medium Ancillary Current Router II Medium Ancillary Current Router II
If you feel like blinging it up, by using some faction modules you can fit an Energized Adaptive Nano Membrane on for more tank. This will not result in increased reimbursement.
[Guardian, Test Machariel Fleet (Mixed Mediums)] 1600mm Steel Plates II True Sansha Thermal Armor Hardener True Sansha EM Armor Hardener Energized Adaptive Nano Membrane II Damage Control II 50MN Y-T8 Compact Microwarpdrive Conjunctive Radar ECCM Scanning Array I Large Coaxial Compact Remote Armor Repairer Large Coaxial Compact Remote Armor Repairer Large Coaxial Compact Remote Armor Repairer Medium Coaxial Compact Remote Armor Repairer Large 'Regard' Remote Capacitor Transmitter Medium Remote Capacitor Transmitter II Medium Trimark Armor Pump II Medium Ancillary Current Router II