The following charts list the required Town Halls needed to donate the max level attainable at each Clan Castle level. There are three charts: one for base (no donation upgrades), one for when +1 level donations are taken into account (in level 5+ clans) and one for +2 level donations (in level 10+ clans).
The walls in TH11 have a max level of 12. Wizard towers and mortars have a max level of 10 while air defenses and hidden teslas have a max level of 9. The max level of air sweepers is 7. Bomb towers have a max level of 6 while that of the inferno towers and X-bows is 5. The max level of the eagle artillery is 2. Golem too will have two upgrades before moving to peak level 4. The witch will upgrade to max level 2. Lava hound will become might for town hall 9 at max level 2. Elixir Spells Upgrades at Town hall level 9
I've found several websites with listens of the max level of buildings and everything for all th levels, yet they all have different levels listed, like for TH7 one website said that barbs and archers max out at level 3 while one said lv 5 which is both wrong. Is there a website with the correct information that you guys know of?
Mortar to level 5 upgrade cost: 400,000 Gold. Mortar to level 5 upgrade time: 2 days. Cannon. The Cannon is typically considered the final defense upgrade at Town Hall 7. This is primarily due to its limited range, slow attack speed, and its ability to only target ground troops. Cannon to level 8 upgrade cost: 300,000 Gold
Bombers are must upgrade troops so peak them to level 16 and pair them with boxer giants. Baby dragons touch level 16 but upgrading them is your choice. Do upgrade cannon cart to level 16 as it can win you versus battles. Night witch reaches max level 16. Drop ship max out on level 16. Super Pekka must be upgraded to level 16. Builder hall 8
\n \n\n\n\n \ncoc max upgrades per th level
gdL73lm. 258 201 353 434 55 44 236 36 401

coc max upgrades per th level