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Guys, I've update the OP and added this to the important information section:
-- WBL/WBR positions are a very important positions in the tactic, they contribute greatly to the attack and the defense so due that they get tired greatly during matches, I strongly suggest using 2 substitutions(around 68-70 minutes) for these positions in order to always have fresh players at these positions. Also, it's important to have fresh players at these position because when the "Conditions" of players at these positions drop to "67%" or less during matches then these players stop running at all and stop go back to the defense after attacks so your defense starts greatly suffer.
Nice info to have, even though it makes me wonder if the WBL/WBR maybe has too much work to do? In a leauge where I can bring 5 subs with me to a game and use 3 of them and knowing that 2 of the subs are already alocated to certain positions "worries" me a bit especially with my luck with injuries sometimes