The way I see it:
-two additional German trained Italian Infantry Divisions would be of no use because fully equuipped and trained they have been comming to late to make an excessive change.
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the addition of another Panzer Division would be one of the best solutions but only FULLY equipped and along with two Pantergrenadier Reg.
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the addition of a Panzer- Grenadier-Division to the theater would be of no good use without a few Panzer Regiments.
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the addition of a company of new Tiger tanks and an anti tank Marder company would be a good add- on but require Panzer Grenadier Regs as well.
-200,000 additional anti personal mines would be good if you consider to keep what you got and def thinking about a Defensive Strategy.
-none of these options are enough to beat back the 8th Army <- The 8th Army was good but not to strong to beat the Germans. I think if the DAK would have had more then the rare Supply shipped over the Med. Sea, then the Brit. 8th would have had a hard time to beat back the Germans.
Under the line: Tanks and Grennys are the optimal choice of mine and I can see Rommel doing a good job with it!