Cygnus, you asked in chat about this. I'm writing it down here for reference. It doesn't have to be in this exact order. Sometimes it makes more sense to build out of order depending on loot & away time. This is just to relate priority with war as the sole consideration:
TH7 Upgrade Priority Itinerary
- Instant Traps (Priority Order: Seeking Air Mine, Giant Bomb, then 2xBombs-- all instant to build)
- you get your first at TH7. It pops a healer, and will nearly wipe a dragon. It's instant, so get it out there first. However, if you time your work so that a builder becomes free on Friday after 2PM, which would be after we are paired against a clan, then this will give you an artificial boost for that war. The algorithm will pair you as a village that doesn't include it. You throw it out there instantly, so now you have a new defense that wasn't factored into your numerical strength ranking. You can use this same strat for upgrading walls on Friday or upgrading/building new defenses that take fewer than 24 hours to complete.
- Labratory* (Upgrade)
- should always be one of your first wave of upgrades after leveling TH...unlocks all upgrades to troops/spells)
- Barracks (Uprade x1)
- upgrade just one barracks to Level 9. This unlocks dragons, and lets you run them for wars. Usually I use a 10 gem boost on Saturday to prep them faster. It still takes a little over an hour with the boost.
- Army Camp (Build & Upgrade)
- so you get your 4th army camp. Build it and upgrade it as quickly as possible. The last upgrade, from 195-200 troops, you can probably delay in service of other priorities up here, but for now, offense > defense. The reason is that even a maxed TH7 base with beautiful layout is going to get wiped in a war by TH8 and TH9 armies. Air defense is just too weak to stand up. The idea is to punish them by baiting them into wasting attacks on it before using someone with a heavy drop to clear it the way Scarzi did this past war. But ultimately, offense > defense because we can presume that you will be cleared. With 200 troops, dragons, and rage...you'll be able to wipe pretty much any TH8 base, no matter how developed, and no matter how well structured. That's the power your offense will have. So get going with offense to secure your ability to net 6 stars in war. It empowers you to shrug off getting bullied in return.
- Air Defense (Build and Upgrade)
- easily most important defense at TH7. This TH-level is ALL about air defenses. So build your second, then upgrade both ASAP. Top defensive upgrade priority.
- Hidden Teslas (Build)
- x2. These are new defenses that can also attack air. You want to get new defenses up ASAP, almost always, and the fact that these attack air gives them priority. They're expensive.
- Archer Towers (Build)
- last defensive structure that attacks air. Get your 5th one out. Early upgrades are quick & cheap if you want to get some in fast while you're in an active session.
- Wizard Towers (Upgrade)
- Now that you have your new air defensive structures built, this is the upgrade priority.
- Archer Towers (Upgrade)
- Follows wiz tower
- Hidden Teslas (Upgrade)
- Building them was a priority over Wiz/Archer Towers, but upgrading is not. Very expensive, and they're not as effective against air targets like Dragons.
- Air Bombs (Upgrade)
- Your final air defense upgrade, so they're next.
- Dark Elixir Storage (Build)
- another defensive structure. I forgot to include this. You won't have anything to produce dark troops with if you don't have DE. So it should precede the Barracks below.
- Barb King (Recruit)
- most buy the Barb King with gems. Either that, or you have to snipe your way up to the Crystal league to find guys with decent DE that you can often take by nailing with 3xlightning. If you want a decent DE win bonus, then you gotta work up to Crystal 2 or better. Once you have him, the top priority for him is to upgrade him to Lvl 5. He gets a rage where he throws out some barbs that effectively functions as a second life for him.
After that it doesn't matter a great deal. Probably order it Mortars, Cannons, Barracks, Dark Barracks, Walls. Then Storages/Mines.
*Lab Upgrades
Lab upgrades don't require a builder to upgrade, so once you get the lab upgraded, here is priority order:
- Rage (acquire)
- Hands down the best spell for dragon attacks. Add it to your arsenal first.
- Dragons (Upgrade)
- get dragons to lvl 2 after that because this is going to be your war composition for a long time: Dragons + Rage.
- Wizards (Upgrade)
I recommend Wiz. Their upgrade from Lvl 3 to Lvl 4 is HUGE (so is their upgrade to Lvl 5, then their upgrade to Lvl 6 sucks, and costs a massive amount of elixir). Their upgrade is prioritized because at Lvl 4 they can kill any other wizard in a single burst whereas at Lvl 3 it would take them 2xfireballs to down Lvl 5+ Wizards. So this means that even if Lvl 6 wizards come out of the clan castle the Lvl 4 wizards are effectively equal to them in a dual. They both blast each other with a single fireball. This really helps with clearing cc.
- /Barbarians/Archers (Upgrade)
- for the above your preference depending on how you use them. These are the other troops with the highest war relevance that you'll often take to clear the cc troops as part of your dragon attack.
- Heal (Upgrade)
- certain war situations might call for this spell over rage, though very rarely, so I'd train it up next. More situations will call for lightning. The guy who dropped 9 slots to wipe me this past war actually carried out one of the more elegant Rage+Heal dragon attacks I've ever seen...but, thing is, I'm 99% confident that 3xRage would have wiped me just as well, and probably more efficiently (less time).
After that it doesn't matter. Now, at TH7, your opponents should be the same, and will only have two air defenses. Many poor players expose one of these AD's on the outer wall. So it can be really easy to just 3xLighting to blast their protected, inner AD, then down this outer one by dropping dragons right on it, or maybe using borrowed hogs, or even reserve cc-clearing Archers/Wizards if you're really efficient clearing cc.
The reason this isn't an upgrade priority is because at TH7, the max AD is a lvl 5. These have 990 hp. Now, Lightning spells, if you center them correctly, will hit will all 6 bolts; the total damage from a Lvl 3 lightning spell is 360. So 3x 360= 1080 dmg. In fact, if you don't miss at all with a Lvl 2 lightning, centering them over the defense perfectly three times, then even a 3xLvl 2 Lightning will down a Lvl 5 AD (990 total dmg). So upgrade lightning to Lvl 4 from TH6's max of Lvl 3, if you upgraded the spell as much as you could at TH6, shouldn't be a priority. Lvl 3 Lightning will down the max AD's you'll face the same as a Lvl 4 lightning will.
If you want to attack up against TH8, then this could be an issue with a lightning attack, but lightning attacks against TH8 (which have 3xAD) is just significantly weaker than using Rage, and isn't advised.