I think the guild stash tab is mostly usefull in the beginning of the league, now it is just filled with junk nobody needs anymore.
We started playing as a group, that is alot of fun. We have been talking about starting a private league some day and do group self found.
Also, the video of Lyngs is outdated. it has been changed quite a bit since then, specialy the modifiers will not be applied to everything connected but you can place it on a + shape on 5 maps. So it's good to build a + shape of fragments with 3 charges to stack the modifiers on.