Drow would be useful as a support. Frost arrows can keep an enemy in attack range. This will enable the carry to dish out damage. It is the one ability that slows enemies. It is not released fast enough to be a damage ability. Also she needs too many items to be useful as a damage dealer. She needs butterfly, mkb, crystalis, manta, satanic. During a match the player doesn’t have enough time to get that many items. Alls those items make her into a glass cannon, but she still needs linkens or BKB to protect against stuns.
She has no protection abilities but Gust
Gust adds to this idea by silencing enemies that try to use abilities. Gust is a good ability, and it is still useful by itself. It keeps enemies from retaliating magically.