I am already 3 weeks playing the game and i simply love it, not to mention that i got my Hive account after i did purchase the Spellbook!
I totally agree with your strategy of accumulation:

• I am buying cards as much as i can and i already own 4 Legendary
• well packs... i really wanted to get one just for the excitement of open the cards, but i did not expected for the packs to finish so fast and i did purchase a lot of daily quests. It was good as a plan but now... no packs for me!
  I am looking forward for October and i will get my revenge lol
• SPS i am stacking as well all of them
• SPT already 1k in power at Splintertalk.io

I can say as well buying Land is super great but right now with this prices i think is better for a new player to concentrate on cards and building the decks.

I do have one question... How to you get the "Champion Points" for the SPS airdrop. Did not figure out that, so i will really appreciate if you will let me know!

Wish you a great day and who knows maybe one day we will see each other on Splinterlands battlefield... be aware i will show no mercy! lol