Right Sona is the archetypical enchanter, and Lux has some enchanter qualities as well they should be enchanting groups. Tanks should not have the same outputs that enchanters have this is important to what makes each class unique.
Tanks are designed to work best in team fights so groups of 3-5 makes sense. But if you are a tank using your ultimate to disengage the group fight then yes Zeke's will not be helpful, though if the other team is forcing you to use your ultimate to disengage then you are already on your back foot and any enchanter style team buffs are not going to be as impactful as your ultimate would have been.
Keep in mind we also just reduced ultimate cooldowns, this is a major buff to tanks, and Zeke's (so doubling down on a buff to tanks).
Edit: forgot to address MR items
MR items are very niche. Armor is always valuable. Armor helps vs Towers, Epic Monsters, and most enemy champions, whereas MR only helps vs certain champions. And ...
Read more