"People with lots of actual experience, like mom and dad"
She doesn't know her parents are already kinda cheating with player knowledge of the game and it's not merely "actual experience".
Tiera's weapon is amazing, but every "normal attack" she does seems to cost her mana just like using a skill in a game. I kinda understand why she wants to "tell him off" for overdoing it because that enchanted bow, while strong, is just not practical for use in continuous fighting. She'd need to carry a second bow for normal attacks and just use that magic bow for tough and high value targets... otherwise she's wasting mana with each attack especially if the targets are weak and will die to a normal bow just as well. And I don't think Tiera has the same amount of mana as Shin does who probably doesn't know what it's like to run out like she did here.
Man, I just love how Yuzuha also gets along well with the other girls, such a sweetie on page 20. She's like everyone's precious sweet little girl. This would have been unlikely if this were a harem story. I haven't seen any non-enemy who Yuzuha dislikes so far.
I thought Kagerou and Yuzuha will get their turns to show off, but Shin arrives in time to face that dangerous boss. Funny that Tiera's first thought to seeing a strange "knight" coming to assist them was that it's most likely Shin.