Since I am extremely bored, I did Guardian vs Nestor, cheapo version.

[Guardian, Guardian]


Corpii A-Type Adaptive Nano Plating
Coreli A-Type EM Plating
Corpii A-Type Thermic Plating
1600mm Steel Plates II
Damage Control II


ECCM - Radar II
ECCM - Radar II


Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large 'Regard' Remote Capacitor Transmitter


Medium Ancillary Current Router II
Medium Ancillary Current Router II

55k EHP, 426.5 hp/s, 272m ISK.


[Nestor, Nestor]


Capacitor Power Relay II
Armor Explosive Hardener II
Armor Kinetic Hardener II
Armor Thermic Hardener II
1600mm Steel Plates II
Damage Control II


Sensor Booster II
ECCM - Magnetometric II
Cap Recharger II
Cap Recharger II
Cap Recharger II
Cap Recharger II


Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large Remote Armor Repairer II
Large Remote Armor Repairer II


Large Remote Repair Augmentor I
Large Remote Repair Augmentor I
Large Remote Repair Augmentor I

121k EHP, 1024 hp/s, 1.046b isk


Implants used in both fits:

Genolution Core Augmentation CA-1 - 160m
Genolution Core Augmentation CA-2 - 147m
Inherent Implants 'Squire' Power Grid Management EG-605 - 120m isk

If you don't want to use these, swap the T2 reppers for Meta 4 in the Guardian fit.
I used T1 LRRA rigs on the Nestor because T2 are 146m each.

Now for the comparison:
Guardian is cheap as balls, fit can be reproduced 3 times with some spare change for the cost of the Nestor. Small sig plus high means it takes less of a beating.
The Nestor has 80k more EHP, can field a set of heavies or sentries, and doesn't require specialized implants or skills.

You can solo Nestor, but it requires either a really good fleet comp, a ton of ISK, or a penchant for gray hairs.
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Or for CCP to listen to logic and reason.