Zapping so slow so boring
I tried it and it's not my thing. Even with a boost the spells are to slow to make and a high DE base to hard to find.
As a fairly new TH8, I have found plenty of DE at Gold 1/2. I use BAM or Barch and add DE as a resource priority. Exposed collectors and the odd storage offer a good supply along with the gold I need.
My BK has upgraded 5 levels in 2 weeks while my lab rolls elixer upgrades. The tricks at level 5 are totally worth the cost of the DE as an extra rage makes BAM rock!
--Do not sit on large stores of DE as you will be a prime target for higher TH's!
---Revenging a Th10 that face rolled you for no resources IS an excellent use of zapping!!