LOW ELO STOMPER.
Blade of the Ruined King is an extremely powerful 1v9 item for Solo Queue, especially in lower elos.
Plated Steelcaps is your go to, AP champs normally struggle against Briar in general. Only go Mercs if they have a lot of AP/CC.
Cleaver is OP with your bleed passive (it counts). The HP is insanely helpful.
Deaths Dance is crucial on any brusier, but extra broken on Briar because she gets an insane amount of healing from her W
Steraks/Maw as defensive items depending on if they have AP burst or heavy CC. Steraks gives 20% tenacity, don't forget that.
Guardians Angel is a good finishing item but very unlikely you'll get here in a game.