(Official, Valguero) Took all my grenades. Took my max damage composite bow. Made 141 flaming arrow. And two good gasmasks. And with all of that I hopped onto Phobos and went to the Lair. There was, fortunately, only one Broodmother there, so I dismounted, put on a gasmask just in case, and started to throw grenades and shoot arrows, occasionally looking through spyglass for signs of damage. By the time I had 9 arrows and no grenades left, there actually were signs of damage! A few tiniest scratches. So I shot remaining arrows, remounted and went in.
After a whole lot of biting the Broodmother was dead. Phobos didn't even lose too much health - less than one third of it, pretty good result for fighting something so strong.
Unfortunately, the game is a bit crashy today, so I'm not sure if I'll be able to get my brand new Spider flag to the base, but the fact is I killed the big arachnid and I did pretty well.
...
Got to the base, installed the flag on my house's roof, fed dinos. Now just need to feed dinos on (Official, Extinction) and refresh base on (Official, Crystal Isles), and that'll be all for today.