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.
the addition of another Panzer Division would be one of the best solutions but only FULLY equipped and along with two Pantergrenadier Reg.
the addition of a Panzer- Grenadier-Division to the theater would be of no good use without a few Panzer Regiments.
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!