1) How can I avoid repeating the most here?
2) logistic or logistics?
3) Have I used prepositions OF correctly?
4) Is the phrase which cover the are of the Republic of Croatia clear here? The meaning should be that these trucks distribute the meat and meat products all over the country.

In order to ensure the most economic, the most precise and the most efficacious logistic/s support, our company's motor pool consists of trucks with refrigiration containers of the loading capacity of 9, 4, 3 and 1,5 tonnes which cover the area of the Republic of Croatia.

Thank you
In order to ensure the most economical, timely and efficient logistic support, we maintain a fleet of 1.5, 3, 4 and 9-ton refrigerated trucks covering all of Croatia.

I would just rewrite the whole thing

In order to provide/offer the best service possible (in an economic manner), the company has a motor pool/(park) consisting of refrigirated trucks of varying capacities including those of 9, 4, 3 and 1.5 tonnes respectively. We deliver throughout the nation.
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Just make sure the word is economical not econoic
Yes, I noticed that classical mistake, or is it classic?Emotion: smile
Students: Are you brave enough to let our tutors analyse your pronunciation?