This wouldn’t override the Otherworldly Senses of Kua-Toa, right?

I’m planning a cavern crawl using them because our Twilight Cleric overuses her invisibility but forgets about all her other pretty damn great features. My plan is to take this edge away from her and get her to figure out how to better use her character (there is another DM in the party who can coach her if necessary but I don’t want to clue him into what I’m doing). 
She’s no noob, she has been quite inventive with her  previous warlock character but just seems to have difficulty acclimatising to her new class (and lower level as it’s a new game)

Since Greater invisibility requires concentration, I think the caster cannot take other actions, but the person whom they cast it on ( other than self ) can. No?

why is there not one for multiple targets?

Quote from SpencerCross >>

This description omits the very important third sentence: "The spell ends for a target that attacks or casts a spell." We just almost lost a party member because we didn't know that.

 It doesn't that's why it is greater invisibility

This spell can be used on "You or a creature you touch."  The 2nd level spell can be used on "a creature you touch".   Does that make this spell greater invisibility, because you can make yourself invisible?

Quote from CaraSagrada >>

Since Greater invisibility requires concentration, I think the caster cannot take other actions, but the person whom they cast it on ( other than self ) can. No?

 Concentration only drops if you:
- cast another spell that requires concentration
- get hit and fail a Constitution (Concentration) Save
- get a status effect that would make you drop concentration (stunned, unconscious, etc)