Ah, so it's
your site! Congratulations on a magnificient play collection. Someone else pointed me to it a week ago or so, which caused me to get totally distracted from whatever else I should be doing. I even translated some of it (badly) using automated online translation services and saved it to disk. For personal use only, of course.
I'm very sorry I didn't see your post here until now. While I'm not sure I can provide any real assistance, maybe I can help with some ideas.
You see, I've been trying on and off to gather similar information myself, but found that it's somewhat uncommon. There's this site,
The Blood Bowl PlayBook, which has done a decent job copying strategies from around the Web, but IMHO its maintainer could have been a little more discriminating.
I think your best bet would be browsing this forum. Formations and setup positioning have been discussed here a lot in the past.
Assuming you've already done that, you may choose to do as I did:download a JavaBBowl Replayer and sift through old matches from successful coaches on FUMBBL, or even FranceBloodBowl, taking note of effective setups. Which might be very time-consuming, quite often entertaining, and definitely educational.
Hope to see your own translations soon, the formation titles were really enjoyable!