Heart of Terasque or Eye of Skaadi for Meepo...

Which of these two would you buy first for Meepo

Skadi, not even a question, heart just gives health. Skadi however, gives health, mana, armor, attack speed and since Meepo is an agility hero, damage. The only hero on which heart makes sense IMO is Chaos Knight since he's a strength-based illusion who can get health AND damage out of the item.

Heart is better if you're against burst damage and don't need to deal more damage, but rather just tank everything.

45 Str vs 25. You can make the argument that it's 45 vs 75 stats, but Meepo doesn't use INT well (just travel back to base to regen mana, you don't use more than 200 mana for goign through your spells). Stats are not equal on Meepo and saying that Skadi is always better is an oversimplification.

Eblade is the damage item, Heart is the tanking item, Scythe is the disable, Skadi is balance in all of them.