u guys had to switch to 10s for lei shi and sha. might i ask why? was it to grab the top 10 geared people to cherry-pick a super strong 10 man group for those bosses? IIRC from Guildox you did similar things for some of the other fights in MSV and HoF.
We didn't have to switch to anything. Mondays we usually do a 10 man pick up group, usually to learn the next boss for wednesdays 25 man. This comprises of anyone who wants to go, no cherry picking. Typically having 10 people (2 of which are hopefully veteran raiders or officers) is great when trying the 25 man. Usually the main raiders don't even want to go so it's usually new people every week. Then proceed to down the bosses on 25 man :).