Don't sacrifice a significant amount of your clear speed for too much Magic Find as you won't gain as much of a benefit. Since there is diminishing returns on Magic Find you'll want to be very careful when choosing gear with it. There is no cap to Magic Find in Diablo 2 although there are diminishing returns that you will start hitting with about 200% MF (shown in the graph below). As for Magic Find on your Mercenary, it'll only apply to your total Magic Find if they score the killing blow on an enemy. For this reason it's possible for you to use the Weapon Swap mechanic to swap to a weapon/shield that is stacked with Magic Find just before the boss or champ pack dies. Magic Find is also calculated when you deal the killing blow to the boss or enemy. In Diablo 2 the first thing you should know about Magic Find is that it Magic Find increases the amount of magical quality items you'll see drop from enemies it does not increase the quality of drops in this game.

This guide contains (hopefully) all you need to know about Magic Find (MF) and Farming in Diablo 2.

Diablo 2 magic finding