While most of my comments are simple attempts at criticisms, the past few have been mostly comments. (In case you thought otherwise, given how useless they are.)
It's fine to leave stuff to people imagination, depending on your genre(personally, don't really think horror is apt). (Give Neil's Gaimen 'The graveyard book' a go if you haven't already. That story, I think, had a perfect mix of giving clues and leaving things to the reader imagination.)
I guess I'm saying this cause nobody's ability is well-defined, so we can't safely say things like:Noon is a better fighter than Jack. If you read comics and discuss them online, then you know threads like flash vs superman debates are common.
Personally, I'm writing a book about people with abilities, and their limitations of their abilities are well-defined.(Really forces my protagonist(and by extension, me) to think creatively to get him out of any dangerous situations.)