Some users told me to add a day/night version for my "Timezone table" because the original one was just to crazy and only for hardcore players.
I will send you my updated tool (not finished yet... needs a lot more stuff to do)
But what's noticeable is the change for F2P players (up to 90 energy difference =15 less battles).
Doesn't seems much for p2p (just 1 refresh), but f2p user need this little edge In short, if you look at my table -6h from leader will be ideal. So US have EU leader, EU have Asian leader, and Asians have US leader.
For hardcore f2p players its +6h (or people working late at night)"
Check out a preview of his new "preptool" spreadsheet here!