PARIS (Reuters) – A hefty EU-wide tariff on Russian energy imports could prove more efficient than an outright ban although even a full embargo would have a limited impact on most countries, France’s economic analysis council said on Monday. The discovery of civilian deaths in Ukraine where Russian forces have recently withdrawn is fuelling fresh calls for tougher sanctions on Russia. While a full embargo would be “manageable” for EU economies, the cost would vary widely, hitting Lithuania, Bulgaria, Slovakia, Finland, Czech Republic the hardest, the Conseil d’Analyse Economique, which is atta…