mannios,
Having had a look at your profile, none of what has been said above comes as news, I guess. Bottom line, you won't beat the Ryan's or Lingus for despatch reliability. On the other hand, doing it your way, you can avoid the cattle mart that commercial flying has become and it'll be infinitely more craic !!
For a run from ED .. or EB.. to Ireland, IFR is way simpler and let's face it, regardless what you fly, you're in an alien environment. Risk management / mitigation is the name of the game. Where are you based at the moment?