How good is Aurelion Sol?

Ay all, just been watching a few guides on how to play Aurelion, (have no idea whether its a boy or a girl, for the sake of this post im calling it him, and yes that is gender assuming ;)) So yeah he looks like a relatively nice champ to play in the top or mid lane and i kinda want to pick him up, for a change of pace in my champ pool. Basically im asking for some tips on how i should be building him, should i take an aggressive or defensive stance in lane, and is he worth buying for 6300 ip?
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