my questions are:
1) is Metal Halide lighting Ok for the flowering phase?
NO. That's why they are growing out. You need red cfl or hps. which could also work for vegging.
2) Should i worry about the base leaves? (get more lights, etc)
No. worry about base buds. If there is a leaf covering a bud or bud-to-be, bend it, tie it, break it, or last resort, remove it.
3) what's your favorite way to cure indica? Hang it upside down until dry, then smoke as needed. I haven't ever found the need to cure anything, but I know many do. Did you check the curing info in the faqs?