Twice I've used Flareon in Random Battles with this set-up:
Toxic Orb item, Guts Ability
Flame Charge Facade Rest Sleep Talk
Use Flame Charge once or twice to patch up its Speed and then it has 140 base power Facade to use either because of poison or being asleep with Rest. Also immune to status this way except the first turn.
Not saying this combo is amazing but I hadn't known about it before and it did better than I thought Flareon could do. Thanks to Guts it was doing a lot more damage than I expected even with the "meh" base power of Flame Charge. (75 with STAB.)
So at least I know of a Flareon set that isn't god awful. --- In the age of information, ignorance is a choice.
Anything becomes less bad when you double its primary offensive stat. Doesn't mean it stops being bad, and Flareon needs more than 1 random battle at +2 to excuse its many failings; remember that "less bad" is still bad.
Make this topic again when Flareon gets either the base Speed to actually use its offense or the bulk to excuse it's sloth; protip, neither is happening any time soon. --- Don't get hit and hit it until it dies, in that order. Kill it, carve it, wear it, repeat it.