It doesn't seem to work with this game especially MSAA, it causes artifacts that keep popping up. I found some compatibility flag to get SGSSAA to work but for it to work I need to activate a basic AA like MSAA.

I tried SweetFX to at least get SMAA even though I don't like the blur side effects but it doesn't seem to get hooked with the game.

My last resort is DSR but I doubt it will work.

Any ideas? The only AA technique I don't like is FXAA, its blur effect is too obvious.

Edit: Well, well.. DSR worked and it solved my jaggie issue perfectly.

I prepared and wrote a guide on AA with the saboteur. Unfortunately I didnt realize that I can't post any links until I hit a certain reputation (some kind of spam protection, I guess.)

I had pretty good results with forcing 4xMSAA via nvinspector and comp. flags.
There's also a SMAA injector which works well.

Strangly DSR didn't work for me, no matter what I tried...

MSAA causes graphical artifiacts with or without comp. flags. I haven't tried any SMAA injector on their other than the in-built function of SweetFX but it doesn't seem to pick it up.

check out mrhaandi's smaa injector if you're interested.
MSAA doenst cause any issues for me... works absolutely fine.
How did you manage to get DSR to work?

All I did was write down the resolution I wanted to downscale from (I chose 2715x1527) in the ini file, made it read-only in case it would crash, activated the DSR option in Nvidia Control Panel, left Smoothing at 25% and that was it.

It seems mrhaandi's smaa injector is the down used in SweetFX, it seemed very similar but I'll try it nonetheless as it's rare I use much else in SweetFX.