These monsters have effects that enables them to be considered as 2-Monster Tribute summon for their respective Elements/Types. This does not trigger Precious Card from Beyond because you are using the monster’s effect to count as 2 tributes, and you really only Tributed 1 monster.
Honestly doesn't deserve the SR ranking. Double-tribute monsters are very rarely used, and this card will not change that. Even if you were to build a deck around it, it would warrant having a LOT of high-level monsters, which is just not a good idea in general.
They could have included more iconic cards from the show such as Spellbinding Circle. I can't really remember any other card from Duelist Kingdom that would be SR-worthy but not completely broken. Spell-Shattering Arrow, perhaps.