To answer your first question…
You’re correct, Advanced nutrient has the standard base micro grow bloom, sensei, and connoisseur line of Base nutrients. The only difference is slight variations in NPK throughout the three.
Connoisseur is a very good one however, I stick with the three-part micro, grow, bloom as it gives me a little more opportunity to add more or less of NPK in different stages when needed.
With that said you can’t go wrong with any of the three base nutrient lines.
What else do I recommend
I’ve used a lot almost all of their products. I’ve narrowed down what I consider a decent starter line that consists of in my opinion must have by advanced nutrients.
1.) B-52 you’re already familiar with this product but it is a must have.
2.) Big Buds this stuff truly sets your flowering stage on fire. It gives you that little boost of phosphorus and potassium that you need when them buds are ripening.
3.) voodoo juice - hands down one of the best microbial life additive you can use. I would never go without it.
4.) Bud Candy as you know molasses offers a nice snack for the microbial life. Bud Candy is a seven course meal! One of the best feeds for microbial/fungi on the market
You say you have rhino skin at the end of the day it’s silica. I found that the cheaper brand Bloom city silica is just as good if not better. The only difference I see is rhino skin cost more.
As far as overdrive I never saw a difference in using it versus not using it.
Sensizym I love looking after the root zone and soil. Sensizym is an enzyme that at the end of flowering I use as it converts all the root zones organic waste and turns it into valuable uptake-able nutrients. It’s not really needed (per se) but when you take the plants nutrients away during the last two weeks it gives them a little something to munch on by cleaning up the useless organic matter and turning it into food
Once you figure out what line of Base you choose the four additives that I’ve listed above are truly all you need for a wonderful grow.
In closing, I’ve found that people who have used advanced nutrients for a long period of time usually will end up with The connoisseur line
I’m a very hard sell when it comes to additives. I believe less is more.
I hope this helps my friend.