Martimus, you clearly have a lot more exp than I do when it comes to PvP but when it comes to missions, I would tell you not to bother since I done plenty of that. If you are doing missions for LP, it's one thing. But if you are doing them for ISK, it's a whole other story. I keep hearing tales about people making 20m isk easily per mission, but I have yet to see anything remotely close to that. Maybe that happens with top quality level 4 missions (I'm doing +4 lev 4 missions atm) but I see no such rewards atm. And did I mention the process is SLOOOW?! I been skill training for a long time now, but no matter how far I train it's never really enough. My Raven is fully t2 fitted, but I am still not doing enough damage to take down ships fast enough, and I cant hit the damned frigates with cruise missiles at all! I do a pitiful 24-40 damage or so to them. People keep talking about how drones help here, well I have t2 hobbies and hammies with average skills, and they still take forever to kill frigates and drones. And I'm not even going to mention how a battleship CRAWLS at snails pace to every acceleration gate... Maybe, just maybe a dominix will be slightly better at killing stuff in lev 4's, but the other issues will not go away.
I would strongly suggest that you forget the missions altogether and start ratting in 0.0. Join a 0.0 corp with SECURE space and rat your heart out. I am currently making 15 mil ISK EASILY in two hours or less, and I am not even fitted for maximum damage. The best thing here, is that you can go ahead and keep training your Dominix, because the fitting is similar for both ratting and missions! As a last note, I want to say that despite me mentioning "secure" 0.0 space above, there is actually no such thing per se. But as long as your corpies actually give a damn and gather up to chase out hostiles, they'll think twice before coming back. This, and watching local at all times, makes 0.0 pretty secure.