When Cavern Dwellers first came about, there was something in the help file about obsidian shards added to their staffs. I don't see that now, but do they make more damaging staffs?

What is the difference between a Welf staff and anyone elses?

Is Caverndweller Bearcharge less effective than survivalist as has been suggested in the past. I don't want to start an Imm says one thing player says another war but going through the search engine I found that one player in particular seemed pretty certain it was. Related to that, could it be that bearcharge works most effectivly in home terrain and so that was their experience?

Same thing for Mariner Bearcharge, is it less effective than stock survivalist?

TIA