I can't help with the agents, as I've never missioned in Minmatar space (screwed standings)
But I can safely say that after a good 2 years running lvl 5's solo. The only viable option I found that worked well was a passive tanked Nighthawk, with an alt on standby in a Basilisk.
I used Caldari agents, so mainly did missions against Gallente. With it's high native thermal and kinetic resists, the NH is ideal against Gallente. I never accepted missions against Minmatar as even with logi support they are barely tankable and quite frankly I lost so many NH's in those missions I just turn them down now.
Never tried T3 either. And as for capitals, they can't use mission gates so you'd be limited to deadspace missions. And any roaming gang would luv to gank a mission carrier for lulz.
So again. This takes you right back to the best, and cheapest option as well. The Nighthawk.
My current fit.
[Nighthawk]
Shield Power Relay II
Shield Power Relay II
Shield Power Relay II
Shield Power Relay II
Caldari Navy Ballistic Control System
Pithum A-Type Heat Dissipation Amplifier
Pithum A-Type Kinetic Deflection Amplifier
Pithum A-Type Heat Dissipation Amplifier
Republic Fleet Large Shield Extender
Republic Fleet Large Shield Extender
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
Drone Link Augmentor I
Medium Core Defence Field Purger II
Medium Core Defence Field Purger I
Hobgoblin II x5
Pith A amps are pretty cheap now and well worth the extra. So are the T2 rigs. Also, The Rep Fleet shield extenders are awesome and still pretty cheap. Same stats as T2, just less of a sig boost. 19 compared to 25 on the T2 extender. So you can use T2 ammo and negate the sig gain drawback somewhat.
As for your alt. Well anything in a support role will do. Leave them on the gate till you need them. Basilisk, even a logi fit domi will do. Hell I even used and Osprey with 3 Large shield transfers for a while. Worked well and very cheap.
