Luxray is probably most replaceable mon at the moment, the speed is rather subpar and there are better electric types like Electivire and Eelektross, with each having their niche such as former with more versatile movepools and coverage if you are able to breed ice punch, fire punch, cross chop into it and later with levitate that renders it basically no weakness with only poor speed as its only flaw, that is unless you run guts toxic orb luxray, which has impeccable boosted attack. In addition to your stats and nature, i would like to also learn about your mons abilities in order to gain a better insight. Arcanine would have a better movepool if you had held off the evolution from growlithe since it learns many useful moves like outrage and crunch in later levels, the elemental fangs are too weak without ability strong jaw which arcanine doesnt have, as better user of elemental fangs are mons like strong jaw tyrantrum.