They all are incredibly similar and while they have their individual strengths and places I will fairly happily play any of these in place of another if I just want a bit of cheap card quality
5 Special Illustration Milotic EX For a Pokmon famed for its beauty, its fair to say that theres not been many notable Milotic cards over the years
Stolen Uniform functions very similarly to Magnetic Theft, an effect Pioneer has not had access to
Harbinger of the Tides means more bounce for blue decks anyway, and each bounce spell is effectively removal when they have to shuffle their hand away
In Collect 151 packs, about 90% of cards pulled are Commons or Uncommons, around 8% are Rares or Double Rares, and roughly 1.5 % or less are higher-tier cards like SR, SSR, or UR
For singles, load them into non-PVC sleeves, then top-loaders