Their modal versatility is a way for control to get an edge, turning it in for card advantage and/or using it to impact the battlefield
For individual cards and older booster packs and boxes, you will just have to gain a lot of experience and learn the nuances of real Pokemon products and then make educated purchases, ideally with a means of recourse if it turns out you were scammed (some kind of buyer protection program, etc)
With that in mind, we have separated some very interesting ramps for this list: However, a Selesnya deck has other very interesting options that may not bring land to your field, but help increase your mana production
Just be aware, that youll need a lot of dice to track everything going on, especially when you go into the double digits on +1/+1 counters
(7/23/2021) Some effects instruct you to roll again