Regarding flying hours I'd say 90-100 hours should be your maximum. Only basing this on a couple of conversations and my own gut feeling but I think any more than this and you're getting into the 'perhaps they have picked up some bad habits' territory.
I think 90-100 hours perfectly demonstrates your interest and commitment to flying. There would be no real added value in flying more than this amount in terms of supporting your application - in fact it may actually reduce your attractiveness as a candidate.