Love the title... For 9 months I've been saying IG100 is the pillar of my droid team and for most of that time I've been a vocal minority. Only now are people realising how ninja he is. It's a shame. I was kinda hoping he'd stay under the nerf radar but I fear this may be the beginning of his end.
For the record, I've found that stuns are his biggest hindrance. Although that might seem obvious, they're so much more damaging to him as his natural speed is terribly slow. Most of the time you don't see this because he's getting 50% TM boosts thanks to 47's lead. This means his AoE will usually give him speed up once he's let it go once. But get a good reliable stunner on him then laugh as it says 'counter attack' and he just stands still.