Grinding in arenas

Hey everyone.....Just wanted some advice on some champions I am planning to grind in arena
Should I grind these : Aegon, The Champion and Night Trasher when their arenas start?????
Should I grind these : Aegon, The Champion and Night Trasher when their arenas start?????
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May 16 Ægon
Prepare and grind when it comes around.
And can you suggest a good mastery setup for me??
Full suicides for grinding.