There are possibilities for creating a ton of tokens here, and that can greatly benefit a card like Halo Fountain
You can always refer back to this blog to get updated information on any Japanese booster box you want to buy, but here's an easy recap of the evolution of guaranteed hit rates over the modern sets: The Sword & Shield era laid the groundwork for guaranteed hits through experimentation, especially with the High Class booster boxes and the last few sets leading up to the Scarlet & Violet Era
Cackling Counterpart has an edge since it doesnt shrink your creatures, but it costs significantly more mana for both sides than our froggy friend
2000 At the turn of the century, Jon Finkels mono-blue artifacts deck reigned supreme
You can easily cast a bunch of spells during each turn cycle since your lands will untap during each opponents untap step
Master one, learn the matchups, and youll be ready to take on the best the Pocket format can throw at you