- 80 stam event maps are hard. Too hard for a player under 200k power. Pests are not that strong but deals insane damages. A non evolved girl, even max level max affection can't take more than one attack. You must get more evolved girls if you want to clear these maps by yourself.
But you can still do it with a strong ally on the more pesty road and stack your squads on the other roads. Event tend to become more and more easy and lest based on RNG. With some stratagies you can do it even if you're under leveled as long as you have good allies.
And if you want, I have a free slot. Id is in my sign, just tell me who are you on FKG and I will accept your request.

- You should do reissues and perma-reissues. And the more importants girls to get on my pov are:
-Lavender (solid gold and best event girl)
-Edelweiss (same as Lavender plus she has +50 speed on her evolved form)
-Geranium (she has skill activation boost, one of the best abilities in the game)
-Hypericum and Mirabilis (they have counter attack abilities and they can be very powerful when fully equiped)

Other girls are less importants. They are good but Reissue take an eternity to collect all the suff at low level.

-5* event girls are stronger than gacha girls in term of stats+equipement stats and skill activation but gacha girls are better in term of skill and abilities.
In a short term, event girls are better, in a long term, gacha girls do a better work with a good team synergy. Even without equipement since equipement bonuses aren't affected by stats boosts.

-Life crystals are more abundant later with 40 and 80 stam maps. Usually you will get enough to get 1 Rainbow Skill bloom and 2 Gold Skillbloom each refill (it's arround 1 refill per month... when dev aren't on top secret vacation, or unexpected laziness). Don't bother with that right now. Anyway, giving Skill bloom don't increase drasticly the power of a girl. It's only useful at long term, when she is already good and in a good team (like skill activation team).
Another advice about that, wait until you get a bit more girls before using skill blooms. Don't use them on meh girls with meh skills (unless if it's waifu).

-If nothing has changed, nation battle are usless right now. Just a small source of Flower Gems, a nest of heavy RNG and a part of the story. Don't even waste stamina on this for the moment. Use it on reissue, it's a better idea.