The video is pretty usless , Sejuani is tank of course she would win against Ashe with no items lvl 1 or lvl 6 , thank god you didnt make Lissandra , she would lose against both , try to do a lvl 18 video with full items , that would be fun to watch
but as the lore Here is my Opinion :
Ashe is weak , just her Avarosa arc is powerful , but she have the Strongest allies , that give her 40% chance to win the war
Sejuani is too wild and angry , her allies just want wildness and revenge , and i think the winter Claw have no chance against the Avarosans ... i'd give 20% chance to win the War
Lissandra is the most powerful of the 3: She is centuries old , she knows all Freljord's secrets , and she controls true ice magic , but she just have 1 allie , True that trundle is the king of the trolls and that he gave her a whole army , and that Lissandra herself have a frostguard army , but i think its still not enough . Thats why she is waiting for the watchers return , if the watchers return , she win the war for 90% , if not , i'd give her 40% , cause none of Ashe or Sejuani know that she is the legendary Ice Witch they all talk about , Ashe consider her as an her allie , and Sejuani dont give importance to her , while she is the biggest threat to both of them , she can wait till they both destroy each other than kill them and become queen , if not , she is immortal , she can wait other centuries for the watchers and rule all .
**In my Opinion , The freljord Queen will be Ashe , with Tryndamere as King , they would make peace with Sejuani , and give her a whole land to rule with her Winter Claw ,they will leave happy , Lissandra will stay hidden , and when the time will come , she kills ashe and takes her body , like she did to freljord queens for generations , after all , Ashe and Sejuani are both mortals , only Lissandra will remain to restore Freljord's greatness . **