Help needed to understand Ohms with split bass cab

[Hellzero]

If you can try this, go on :

 

[Hellzero]

Or this :

 

 

[Fingers McGee]

Thanks all. I bit the bullet and got 2 2x10

cabs and 600w head. Even just 1 Of those cabs will be better than my current amp

thanks all for your help. Wouldn’t have made the right choice with it