Timeline Questions

With all the Shurima lore recently I was wondering how it fit together in a timeline with some other events - I've sorta placed them in the order I get the impression they occur in:

Anivia's birth - "a thousand lifetimes" and each lifetime is an era - which I believe is the earliest event in the known timeline of Runeterra Gnar's Birth War between Protectorate and the Magelords (Aatrox) - "As old as recorded history" - also are the Magelords Zilean's people? Fall of Urtistan (Zilean's home) - "long ago" - attacked by dark summoner-knights Shurima's fall - "eons" Amumu's Death Lissandra original betrayal (Frozen Watchers) - "centuries ago" Poisoning of Odyn Valley \ Hibernation of the brackern (Skarner's people) - "centuries ago"

Are there any events I missed? Minor additional question - what is the connection between Skarner and Taric - or is it they just use similar magic?