Originally Posted by
jamesserrano9999
well it is a great tip. however. it is not advisable to most of us (i think).
normally i do put walling just in between upgrading.
example i will upgrade air def level 6 with cost 4.32M. i will farm around 6M. thus i can wall 2-3 lvl 9 (lego walls in between) 2 gold + 1 elix. unless i will upgrade cheap units (the only cheap left for me are air bombs and mines). i cant seem to farm extra 3M just dedicated for walls. unless you boosted your barracks everytime.
i already have 62 lvl 9 and 188 lvl 8. already in the mid th9. i guess i will just finish th9 with lego walls which is pretty common in th9