I am finding Isabella to be quite weak in online battles, she doesn't really bring anything to the table that sets her apart from the Red Duke (who is a better caster on a mount), Mannfred (who is a better though more vulnerable caster), Vlad (who has so much more sustain), or a cheaper generic vampire lord.
She does not have Arcane Conduit (or Master of the Black Arts if we want to be more flavorful) so her spellcasting is lesser, why not give one of these two to her to bring her more in line with the Red Duke/Mannfred? I feel as though without arcane conduit she's meant to be a less-tanky Vlad on a mount, which I am all for but her sustain is lacking. The issue lies in the healing cap and her Blood Chalice, it can only be used on herself/heroes once MAYBE twice before the healing cap is reached (as it seems unlike Vlad's passives it isn't increasing the healing cap.) Also vampire heroes tend not be the biggest of powerhouses to warrant focusing on them, but that's a discussion for another day.
Her unique playstyle (vargheists and bats galore) is not reflected in the online battles and she feels like she doesn't succeed well enough in anything to warrant picking her over other lords. Poor dear.
Have others been having a better time with her? Am I approaching her wrong?---