If you have the patience to AFK, that's a money maker in any mode.

I personally find it challenging to create a fit that I can make money in. I could run proto stuff, but might not make money.

I have found after practice I can now take on proto suits, with a combo of std and adv gear, and get kills, despite being a 200 ehp scout.

If you are really short on isk, make some militia suits that you can burn through. You might not get a high kdr, but if you are looking for that in this game, you might need to wait until you get 20mil SP to be able to do.

Otherwise, take note of what kills you, and the circumstances, and use your SP and modules to shore up weakness. Maybe you will hit on something that you are successful doing and can isk.

If you want to maximize ISK creation, your best bet is ambush games -- no question. As you've already found out, your KDR will suffer, but it will allow you to make money as long as you keep your cost per death low (or zero).

Run starter fits for a week or two, your game will improve and you will make ISK all day.

Don't run anything prototype. The prototype suits are much better than advanced but few other things follow the percentage increase like a suit. Most modules and weapons aren't that much better and to me the increase in performance doesn't justify the increase in price. I run advanced suits with advanced mods and BPO weapons and I get by, if I were a better shot then it would be no problem at all. My kdr is 0.65 and the only proto item I use is a tool.

I run Domo a lot, and I make tons of isk, my fit.

Frontline assault
Basic RR
All BPO mods


Stay 50-60 meters away from blob and pick and choose your engagements. You could throw on a basic uplink,+25+25+25=more iskies.

Deactivate team voice
Select Domination
Use cheap uplinks (if skilled)
or use your cheapest fit (MLT)
Hack everything that you can
Pop and Drop strategy (good for MLT fits, use them hills and cover)
Let the ISK rack up

It's best to play Dom with MLT fits or the cheapest MLT fit you can muster. Ambush, while seemingly a good way to make money, is too overrun by tanks and proto fits. Unless you're extremely disciplined (or want to get disciplined), you won't have a good time and will be at the bottom of the leaderboards.

I don't use a mic, running solo a lot, but I've taken to joining random squads in each match. As has been said free suits are the best way to make money & frankly I almost always come out with a positive KDR (not that it really makes a difference.)
As for game modes, if you know what you're doing you can still make the best out of a Skirmish, I personally run all 3 at random.

Another easy way to pull some cash is to build yourself a tank, even with all militia stuff you can be viable & grab points blowing the enemies stuff up... As a pilot I love it when someone else wants to take out the enemies turrets (but no one ever does.)

If you haven't already, it's a good idea to learn the maps so you can have a plan before it starts.