What are the max levels for troops and spells at Town Hall 11 in Clash of Clans?

Updated list of all troops, spells, buildings and traps of Townhall 11 maximum levels are (2020):

# Exilir troops:

1. Barbarians, archers, giants and wizards →level 8
2. Goblins, balloons, wall breakers and P.E.K.K.A. → level 7
3. Dragons → level 6
4. Electrodragons → level 2
5. Healers, miners, baby dragons → level 5

# Dark exilir troops:

1. Minions, hog riders and golems →level 7
2. Witches and lava hounds → level 4
3. Ice golems and Bowlers → level 3
4. Valkyries →level 6

# Exilir spells:

1. Lightning spell → level 8
2. Healing spell → level 7
3. Rage spell → level 5
4. Freeze spell → level 6
5. Jump spell → level 3
6. Clone spell → level 4
7. Invisibility spell → level 2

# Dark-exilir spells:

1. Earthquake spell, haste spell → level 5
2. Skeleton spell, bat spell → level 4
3. Poison spell → level 5

# Storage and collector buildings:

1. Exilir collectors, gold mines → level 14
2. Gold storages, exilir storages → level 12
3. Dark exilir storages → level 6
4. Dark exilir collectors → level 8

# HERO’S:

1. Barbarian king → level 50 (ability 10)
2. Archer queen → level 50 (ability 10)
3. Grand warden → level 20 (ability 4)

# Special Buildings :

1. Clan castle → level 7
2. Laboratory → level 9

Total units: 35 troops, 2 spells and 1 Seige machine.

# Army training and stationary buildings:

1. Army camps → level 9 (260 Capacity)
2. Exilir barracks → level 13
3. Dark exilir barracks → level 8
4. Spell factory → level 6
5. Dark spell factory → level 5

# Defense buildings:

1. Archer towers, cannons → level 15
2. Eagle artillery → level 2
3. Inferno towers → level 5
4. X-bows → level 5
5. Bomb towers → level 6
6. Wizard towers → level 10
7. Air defenses → level 9
8. Mortars → level 10 (gear-up, only 1)
9. Air sweepers → level 7

10. Hidden teslas → level 9

11. Walls → level 12

# Traps:

1. Giant bombs → level 5
2. Bombs → level 8
3. Spring traps → level 5
4. Red air bombs → level 6
5. Seeking black mines → level 3
6. Skeleton traps → level 4 … ( Max )
7. Tornado traps → level 2

Maximum time taken to max out the base → 11 months to 15 months.

Total resources required for walls: 900 million

Common startegies: Electrodragon attack, lava-bat-loon attack and golem-witch attack.