[mothered]

I like to play mmorph and rpg games like dark souls ect. I also enjoy playing league of legends sometimes.

I was thinking nvidea g1060 3 gb might be suffient but I'm not entirely sure.

The GTX 1060 (3GB) will easily handle the above games.

I recommend opting for the "6GB" GTX 1060. It may be somewhat of an overkill for your usage now, but It's always good practice to accommodate for future needs and developments.