It really depends on opponent heroes like some people said.

If you are choosing teamplay, boost your HP (bracers, sange) since you will need HP to escape after swapping.

If you are trying to solo hero, I still suggest MoM -> Stun, MoM and attack and swap... then another stun and attack. In this build, I will get thread, MoM, linken (because you will initiate stun first, just in case target can disable after being stunned, you can escape it with linken), then damage items. Some people like to swap first... but at high level, you might not in the stun range after swapping and good player will run to another side to escape instead of running back.