Seeker's Summoning Statistics: Seeker goes nuts because Muspell Units Banner is an INCREDIBLE deal!!

Table of Contents:
I. Intro
II. These units are good
III. The cost is unbelievably good
IV. Final notes

I. Intro
If it's only going to be Laevatein, Laegjarn, and Helbindi on the banner, I'd say this is a banner not to be missed.

II. These units are worth pulling
Copied from a comment by Dread Kaiser in the datamine with statlines added by me:

Laev has
Fury
ATK/DEF link
Odd SPD wave
37/31/34/22, 39HP

her sister
R Flying Duel
CHILL ATK
Distant Guard
32/36/36/17, 41HP

Helbindi has
Vengence
G Infantry Duel
Guard
Infantry Pulse
35/18/35/31, 44HP

Ok, so first of all, Laegjarn and Helbindi are gold mines for fodder. R flying duel, chill atk, and distant guard are all skills worth foddering. G infantry duel and infantry pulse are both fantastic, the latter especially in the wake of special spiral. Laevatein is still pretty good with odd spd wave and atk/def link, but not as good as the other two if you ask me.

Now, all of them have excellent statlines. If they keep their prfs too that we encountered them with when they were our opponents in the story maps, they are extremely good units in themselves.

III. The cost is amazing.
If indeed we're doing 3%/3% with just these three, you're looking at 74-ish orbs spent on red stones to pull a focus red. That's about as good as wanting 3/3 reds on a legendary banner; the difference is less than 10 orbs. It is EXTREMELY RARE to get this good of a price on a red focus unit.

What makes it even better is that we have a single focus green, and you're looking at around 87 orbs spent on greens per pull. Why is the single focus green so good? One, because pulling for a single focus unit on 3%/3% is already one of the better deals you will get if you're pulling for a specific unit (which is usually going to cost you a ton if you try it on a legendary banner); two, because red being the other target colour means you almost never enter a circle to find no stones you want (i.e. all blue and colourless); three, because pulling multiple colours will save you an extra 4-7 orbs per focus unit on average, which will add up to something like 20-30 orbs if you start pulling 4+ focus units.

EDIT: the thing that can throw it all off is if Laevatein shows up first and you only want one copy of her because her fodder isn't that great. Then you're back to wanting only 1/2 focus reds and getting her only every 158 orbs, which is still one of the better offers for reds but nothing to go nuts about like I just did.

IV. Final notes
Don't forget to evaluate this offer in comparison to other banners being offered to you.