I always go for the 2-Base Ravager-Ling Push--around 5-min; &, I did the same thing, again--this time, too. I choose to make 2 Drones to build the Roach warren, &, Baneling nest, before the 2nd Hatchery--these days--'cause I need the 1st Roach to morph into a Ravager--earlier than before. I do want more Vespene gas; but, &, butt, that's a "más o menos"--thinking I keep on attacking using those fast Lings; I just need gas for a few Banes & Ravagers, &, all the other units are going to be Lings(｀・　ω・　´)ゞ!!