Very few interactions will stop mana abilities, and split second isnt one of them
The life gain from the sisters also helps you beat creature decks because you gain so much life that its hard for your opponent to kill you
I wouldnt recommend playing Tithe in any deck playing green, as it doesnt put any lands youre searching for into play, but ensuring you can start with 2-3 lands and an extra color or 2 of mana earns it a slot in many decks
It can go in any green deck, requires very little setup to cast, and really disproportionally impacts the player to your right
Theres another possible fail state with the deck where you can draw Charnel Trolls and no enablers, or else miss your enablers, but you should usually be able to cast a different three-drop in those spots and cast Charnel Troll later in the game after your opponent has killed some of your creatures
They come in and immediately ask you to go grab a basic tapped and gain a life