If your just interested in running the Guristas 4/10, it can be done with a long range light missile sniper fit without any tank.
I run the 4/10 on one of my alts several times a week with this fit:
[Corax, High Sec Guristas]
Crosslink Compact Ballistic Control System
Crosslink Compact Ballistic Control System
1MN Y-S8 Compact Afterburner
Astro-Inertial Compact Missile Guidance Computer, Missile Range Script
Astro-Inertial Compact Missile Guidance Computer, Missile Range Script
F-90 Compact Sensor Booster, Targeting Range Script
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Small Hydraulic Bay Thrusters II
Small Rocket Fuel Cache Partition I
Small Processor Overclocking Unit I
220 DPS at ~84 km
The jackdaw should be able to achieve much higher dps at similar or longer range with a better shield buffer because of its built in resists.
Wrong. The longest range cruisers in this site are the Pithum Infernos with about 75-78 km range. I orbit with an untanked Corax at 80 km and nothing in the site can hit me. You only need enough buffer to burn out of range and then it is cake. If an untanked Corax can do it, then a Jackdaw mostly certainly can do it without tank.
[Jackdaw, High Sec Guristas]
Ballistic Control System II
Ballistic Control System II
Ballistic Control System II
5MN Microwarpdrive II
Small Shield Booster II
Missile Guidance Computer II, Missile Precision Script
Missile Guidance Computer II, Missile Range Script
Republic Fleet Small Cap Battery
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
Light Missile Launcher II, Scourge Fury Light Missile
[empty high slot]
Small Hydraulic Bay Thrusters II
Small Rocket Fuel Cache Partition I
Small Processor Overclocking Unit I
300+ dps out to ~87km range. Put a shield booster on there because I didn’t know what else do with the extra mids, it certainly isn’t needed if you orbit at 80 km.