If you have upgrades, it may be that you have upped life pends. Those enable several Leafies on turn 1, which increases your CC resistance (with Light mark). It also lets you Mito a Leafie early if need be. Since CC is the main thing this deck loses to besides Dims, Hope and SoSa, I tend to prefer the upped pend version.
With Light Towers you tend to get so much
that you can consider fitting in an Improved Miracle to stand a better chance against SoSa decks, but keeping it rushy is just as valid for the sake of consistency. Feral Bond and Light Nymph follow the same logic whereas Green Nymph adds to the stallbreaking power of the deck. Lots of options, but this version is a consistent rush build.
Oh, and pends let you EM a lot of 1 HP decks in Arena. As you may know, those are quite numerous nowadays.