One scoop of Plazma before and one scoop of Plazma during is basically as good as it gets and has all bases covered. The Surge Recovery after isn’t bad, but it’s redundant and not adding much bang for the proverbial buck.
What some people do, to keep a budget in place, is one scoop of Plazma before training and one scoop of Surge Workout Fuel during training. That’s a solid compromise because Surge Workout Fuel and Plazma share several ingredients, so they coordinate much more than Surge Recovery, which is a much more basic formula.
I like to use a good-better-best scale. Surge Recovery being good, Surge Workout Fuel being better, and Plazma being best. Piling good on top of best is, like, just not that much better than simply using the best. (Did that make sense? Hope so.)
Creatine isn’t “essential”, but it’s extremely useful, time-tested, and well-researched. This article talks about many of the common benefits and this article discusses some pretty neat unexpected non-muscle or fat-related benefits.
There’s no problem adding it into the current plan. 5g around training (right into the shake before or during, no major difference) and/or 5g in Mag-10 anytime on rest days (it’s just convenient that way. I throw it into my before bed Mag-10).