i mean it may not synergize the best relative to others
and you may have to play mildly differently than the accepted standard for the hero
but its always good
the problem is not the hero
its the player
But dp is all about kiting your enemies while your ult is active, the delay + windup for casting on her first two abilities hardly make it worth it. Not to mention you're not getting items to become tankier. Thats an entire slot that provides nothing that dp wants amongst movement speed, int, mana regen, hp, armor.
I don't think the blink make it worth the stats you pass up on. Other mobility items or chasing items do a better job imo and they provide stats (skadi, shiva's, atos, force staff) while not getting to far out of sight of those you're kiting since you want the ghost to damage them.
I see the benefit on storm for example early on with his mana cost, but DP? What does she gains that would make up for an empty stat slot that would make me want to grab it over other items that allow kiting or chasing and give stats?