Build both infernoes right away! Id recommend leveling them to 3 straight off...
5 builders
2 builders Infernoes to lvl 3
1 builder Spell Factory then Laboratory then clan castle
1 builder Army camps 1 at a time
1 builder on new stuff xbow to 1, then mortar to lvl 6 or so
Other then inferno, xbow, 4th mortar, offense>defense... So, army camps, clan castle, spells, lab.
After all that, wiz towers to max is cheap relatively, then mortars to max, then xbow(s) to 3, then teslas, then xbows to 4 (very small dps increase huge cost), archer towers, then cannons last.
DE drills can be upgraded after elixir based offensive upgrades are complete
