Greenfig:What can i say:In your climate,any self fertile fig will make good figs and will not sour easy,but in my climate,beside having a good taste ,fig tree have to be early ripening and resist rain while ripening,or else,it will sour and split so bad that will be non edible.
Marseilles black vs seem to be more drought resistant,and it grows well even in Arizona.
What I would suggest ,grow Malta Black in ground,and water,the plant twice a Week.
I think it suffer from lack of moisture when young,and does not have deep roots.
When roots goes 10 foot deep,it will find water by them self and,will not need watering anymore.
But it will take about 7 years of struggling in your climate,especially the last 4 years,with drought,you guys had,possible that no water is left in the ground anymore.