Missions & Complexes

I would like to know , if i can solo all level 3 missions, draw aggro from the full room and tank it without warping out, will i be capable of running level 4 missions?

only one way to find out ;)

Forgot to mention that i fly a shield tanked navy domi all important shield skills at 5 .

with a 750 dps garde dominix you should be fine, to be honest. If he has l5 skills he's set. Just make sure your light drones are skilled up so you can kill frigs. It's really not that hard to do level 4s if you kill frigs fast. However, you should be careful, because in some missions the frigs spawn another wave of enemies when shot, so they have to be shot last.

For safety in missions, use eve-survival.org it helps to know what you are up against

all hail the mighty space potato!

Log on to sisi and try it :)

When starting out with 4s I think it most important to use tactics. Fly around the edges of groups and agro one group at a time if able. When you are more comfortable with your tank then get more risky. Always take out frigates first, they are what can ruin your day with scrambling. Also use http://eve-survival.org/wikka.php?wakka=MissionReports or similiar to know just what you are facing and what resists you will need.

^ As above. Managing agro in LVL4 is very important. Always read the mission reports to find out what the triggers, spawns, dmg type, loot is etc. I'm hoping you already do this for lvl3s.
Usually you read the report and figure out how to agro pocket 1/4 without attracting the rest of the room, leaving the trigger for last.

As all said above. LvL 4 missions aren't a huge leap from 3's really. Watch for warp scrambling frigs in lvl 4's that weren't there in the 3's.
Some folk use Drakes, I bought a Raven and proceeded to pretty much land on a grid, pick a group to aggro, kill them, rinse and repeat, often not even moving the Raven at all. That's T2 shield mods and T1 missile launchers- faction ammo. I used T2 drones but have very weak drone skills overall, they're just there to knock down frigs.

I found that I spent more time slow boating a BS around than I did actually killing the rats. Other than managing aggro and fitting tank for the specific enemy DPS, they aren't terribly different. Just remember the warp scramming rats and send drones after them right away.

You're probably well qualified to run lvl 4 missions, just need to break down and run a few. Try the easiest ones in your Lvl 3 ship, drop the prop mod for another shield mod for more tank. You'll prolly still need to warp out on occasion, but no big deal if you dealt with the scramblers.

The rewards jump for level 4 missions, once you get to running them, you'll only look at 3's and below again if you're grinding status up to run 4's.

You don't need sentry drones, but they revolutionize your play style. Anyone who says they lack dps relative to heavies hasn't thought about travel time.