Link to video...
Tired of losing to this bytch
And of course, I can't find the video, so I'll break it down the movement patterns and what I used to beat her:
Axe: Njord's Tempest light runic attack; The River of Knives heavy runic attack..... Looking back I didn't like using the axe on Sigrun or any of the valkyries, but you can lose spamming any runic attacks you have.
Blades of Chaos: Cyclone of Chaos light runic attack; Gift of Apollo Heavy Runic Attack..... The BoC is my preference for Valkyrie fights because they cannot easliy escape it range, whether on ground or in air; Just be patient and don't spam regular attacks with runic attacks because the AI will counter with unblockable attacks(like the aerial pounce Sigrun does). The Gift of Apollo is the game changing attack because it gives you health while using the blades, but only if you make contact with enemies. Keep that in mind when using it.
Talisman(optional): I can't remember it's name, but it basically slows down time for 5-6 seconds. This is useful for gathering health on the battleground safely without getting murdered. Sigrun will make you pay if you try to pick up health without your defenses up.
Ok, now for movement patterns.....
Ground
Sigrun Dash Right= Unblockable wing spear.... roll right.... and don't get caught in corners.
Sigrun Dash Left= Alternating wing attack... Hold shield up 2x for each side
Sigrun Quick Dash Back=Spinning wing attack, Hold shield up, then be prepared to move or roll quickly because....
Aerial Pounce comes either after the alternating or spinning wing attack... that bytch moves fast, so you have to react quickly. I know this isn't a ground move, but she links it with ground moves, so it's important to recognize the signs.
Also after that spinning attack, sometimes she just leaves your field of vision, which cancels your lock-on targeting. Don't panic, just hit the down button on the directional pad to see what's behind you. Generally, she will be in your field of vision, then you can re-establish your target lock.
Ice Barrage.... easily countered by blocking with shield for regular blasts, then roll out of the way for the final unblockable blast.
Scythe rush.... there are two types, but generally the one she does, you have to evade twice by rolling backwards from reach. If you get hit by the second wave, you be blinded for a short moment and your lock-on will have to be re-established. The other rush, which she rarely does, can be parried with your sheild, then countered with a runic attack.
Wing guard..... Easily break her guard with your shield, then counter with a regular or runic attack
Aerial.... anytime Sigrun flies in the air, spam with a couple of arrows to prevent her from doing those unblockable, instant kill attacks. If her animation isn't interrupted, then the attacks you'll see can be evaded easily, then countered. Just be patient, but react quickly.
Flying rush.... generally done 1-3 times. Easily evaded by rolling. Counter when she lands.
Aerial pounce .... done 1-3 times.... easily evaded by rolling or sidestepping(I roll everytime). Counter after she lands.
Ring projectile.... Shield for the kamikaze attack(rolling is useless. You'll still take damage) and roll for the unblockable attack.
Spam Atreus's arrows and aminal attack(the Crow joint is most effective. It follows wherever she goes) during the entire fight.
You can cancel most of Sigrun's attacks(not aerial pounce) by going into rage mode... kinda like a combo breaker...
Maybe get a health resurrection stone for insurance.
That's how I beat her.