So i've checked the wiki and some forum posts and im lacking quite a bit of information.

While the wiki shows the hull of 3000000 units, it dosnt show how high and how fast the regen of the shields are with nor without queens.
Could someone experience help me out in understanding how the levi shield works in exact detail (not assumptions!).

greetings
Xeha

If you in the same sector, you can target the leviathan and /msg it "wtf". This will return the information that you're looking for. This also works with any other NPC in the game. One they are drunk or high enough it might work for some PCs as well.

Levi with queens (didn't had time to kill queens yet, will do later):

{shield_recharge_rate,200000},
{shield_max_strength,250000},

The leviathan has a base shield recharge rate of 25,000. It gains 25,000 for every queen belonging to that hive, including those in the leviathan sector (4), and queens from "critical" hive skirmishes.

And to note the last time I checked the serco one is bugged. 2 Levi's and after killing all queens their shield str and recharge is still at max

In grey and I would think both nation space to be same(?), you may find a critical skirmish not available from the mission menu. These hidden HS are found by following the hive bots out of sector after the queen has been destroyed. If the bots jump to a wormhole sector you have no more critical HS for that system. You will need clear Latos, Sedina and Odia before you can be certain that the Levi shield is correct for no queen strength.

This could be the cause of the 'bug' Inevitable mentioned?

Thanks for the infos. The 2 levi in 1 sector also happend once in Grey, was good to farm queens. According to raybondo this is a bug which shouldnt happen.

There is a more simple approach regarding the crits. Corvus, Tunguska and XangXi have hive missions available. The mission list you get is for the closest station near to you. Simply jump trough empty space close to these station and you'll know all the locations.

Of course, this way cant find the hidden ones.

Yes, Xeha, I do the same thing so that I can easily jump out to the certain sector. I use this method to get small skirms for crystals.

I tried to do /msg %target% wtf. I get some stuff but no idea how to read the stats, did the devs disable this?