Kilmarnock manager Derek McInnes was left to rue key contributions from Jack Butland, James Tavernier and Tom Lawrence as Rangers came from behind to secure a massive 2-1 win at Rugby Park on Wednesday night. Two wins. Two very different wins. But, as far as Rangers are concerned – Philippe Clement’s side scraping a 2-1 triumph on the road away to a team who defeated them on the opening day – these three extremely hard-earned points could yet prove to be a decisive moment in an enthralling title race, on a night in which Celtic entered seventh heaven at home to Dundee. Not for the first time, …