Oh I didn't even see RoA. Yeah don't get that. Even if your team sucks if you're needing RoA HP you're doing it wrong because your team sucking shouldn't have much bearing on you being in a position that you can't get hit.
Hell your team might be sucking because they've got a Lux way to the side who's not outputting nearly enough damage to justify taking a character slot on a character who's not going to take much of the teamfight damage yet still has 2500 hp.
If you have people charging you a lot just go Flash + Ghost and feel safer not having the RoA. If you're going for a damage summoner I think surge might be worth consideration over ignite for lux just because you don't need to get close to use it (and with all the aoe on her spells it might add more damage overall)
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No problem!
This is a cute and pop genocide of love!