Is it worth burning apples for 1/2 dailies, or better just to wait for the next lottery event?

Just wait. Lottery not only have xp cards, but skill gems, materials, QP and mana prism all in one.

If you have 30 or fewer, save for lottery. If more and you need stuff not in lottery, why not?

Wait, lottery is definietely more efficient

I'd say to save them for the lottery, since this time you can reset infinite times