Sounds hard and unreliable, but certainly looks like a fun strategy that is annoying to the enemy :) +1 (certainly nothing for playing her a few games, that has to be trained more often, due to its unique style.)

Edit: OK WTF? Forgive my tone, with all due respect, but before 16 (so 2 of the talents) Banelings don't do **** from range... 50% of the health of the first 2 creeps is taken... YOU wrote "destimate whole waves" ... Edit2: On 16 it just kills the first 3 melees.. (3 talents!). Still a decent build.

Spell Shield I like to get this at 13 instead. Because - imo - Grooved Spines is only good if you also take its synergy Brood Expansion at 16, and the spellshield really suplements the whole hero, not only the pushing style and enabling to flee better but also to fight a little, but that's ofcourse up preference, as you described "then just look at the minimap better" :)

Edit3 (after many games): Wow this is really a very nice potential build. It is amazing of how much you can do vs 4 enemies in defense and antipush, even when your allies are bad (current matchmaking) = FUN :L. Also check out this guide: http://www.heroesfire.com/hots/guide/glory-to-the-swarm-zagara-guide-by-anansi-2439 Which goes a little deeper into strategy (i do not mean the builds, just the guide).

p.s. I let the starting there, incase you like first impressions :P

I absolutely love this build, I have played 2 matches with it so far 1 loss 1 win. Both games were incredibly enjoyable because of this build. It may not be the most competitive build but it is the most fun build and I will now only use this build thank you so much for posting this build.