imo anklets , banded armor and scaled helm ( or whatever the 525 mana helm costs) , takes a few secs extra but well worth it , your fast enough to get the boots later and you have a more staying power/harass opportunities in lane
This. To snare somebody you have to catch them first anyway. UB is usually the fastest DG in a game with Anklet, Boots, skill and innate fast speed, which pretty much eliminates the need for snare effects. Anklets also help more against demigods early game, and good early game means you can later afford to buy those damage items.
I find planning for ultimate lvl 20 build isn't really helpful, most games won't go that far, and even if they do, good early game can make up for weaker items later. Though Anklets' effect is pretty much irreplaceable even lategame.