The profile doesnt load on my browser for some reason. Anyway, I know wht u mean and I knw the feeling. if like u said he only scores against "lesser" teams and goes missing during "crunch" matches i.e. against title contenders then personally for me, he is good but not good enough. I would keep him as a secondary striker and search for a better one who is capable of scoring against all types of opponents and play them as a pair. He is still useful.