DIY
Levelness matters a lot. Think of it as a right triangle, where 1" makes a big difference in tension. I often use tensioners to compensate for ground irregularities, but I use them minimally, perhaps 4 per tent, and in winds higher than 30 I try to avoid them. I use them in low spots to compensate.
I'm not sure how your tie out is constructed, but you could use a little para with a taughtline for adjustment.
Stake selection would be an excellent article / blog post etc if someone is interested. It varies so much. In loose ground having better depth is better than more surface area, in some areas though where the soil is not deep then surface area matters most. In loose snow some things can be used, but in snow over frozen ground it's another challenge. I use concrete screws when our ground is really frozen and snow depth is minimal. When snow is deep and soft I probably prefer buried anchors with adjustment lines. Sometimes I have used stuff sacks filled with rocks. I left a BCS up for a week with nothing but stuff sacks and rocks. They would move in higher winds, but I could have thrown in more rocks.
There are some articles on backpackinglight on stakes but most require an account.
