It's been a while since I've update my Kroot Horde P&M Blog.
I finished painting my Kroots last summer. Here's a couple pictures of all 100 of them.
My 100 Kroots have already seen action in various games against Jy2.
Front View
Side View
I'm currently painting my 30 Ork Boyz and 15 Nobz Bikers death star.
While a 100 Kroots is overwhelming, it's not super competitive. Shoota Boyz are far better being cheaper in points, have a 6+ armor save (better than nothing), T4, and having the Big Mob rule. If you want to field a super competitive Ork + Tau list, I suggest you use the one found in this battle report:
http://www.dakkadakka.com/dakkaforum/posts/list/500238.page
When I have time, I'd like to test a pure gunline Tau + Ork army. It will feature Shas'
el Warlord, 100 Kroots + 5 Hounds, 12 Fire Warriors, 9 Broadside, Big Mek with Kustom Force Field, and 60 Shoota Boyz. That's a lot of dakka. If positioned correctly, everyone will have a 5+ cover save.
KFF doesn't need to cover all 8 units, just the front ones. Broadsides will have target locks, allowing them to counter mech spam lists. They are also good against flyers.