Ash has become so useless in today's WARFRAME game, the only time i use him is with the Fatal Teleport augment to unlock rivens. i hope to add another useful opinion to this discussion hoping Ash gets help. And making his base warframe parts come from odd places when they used to be random drops from Grineer Manics (which made sense) goes into another discussion i'd like to call "The Grendal Problem" but now onto my opinions of Ash.
Ash is built to be the representation of a ninja, and it would be fitting to have his abilities align with what ninja's are and do. i'm no expert on the arts of ninja's but it's been a subject i've watched videos from content creators who know what being a ninja is all about.
1. Shuriken; Should NOT seek enemies, but be at least five ninja stars, where they land they create a "slow area" that gives stacks of slash as enemies walk over the location and the stars stay depending on duration.
2. Stealth ability; This should be a reactive ability, just like how shade's ability works where you activate it, then upon being "almost spotted" you go into stealth depending on duration, but you can "activate it" by pressing the ability again. Does not need to be long but should be longer than five seconds.
3. Teleport; This ability should be completely changed. You should be able to target an enemy and, as long as you don't do anything Warframe like, as far as the enemies are concerned your one of them. Shooting an enemy while under this cover will cause enemies that didn't see you to randomly shoot other enemies similar to Nyx's confusion.
4. Shadow Clones; All alerted/aware enemies get a stealthy shadow to assassinate them. Without effecting any enemies that are NOT alerted/aware. And doing either or both alerted enemies or aware enemies works without making this ability a "full room clearer" like before, while being a "pseudo room clearer" as in endless missions all enemies are normally "alerted" but can be set to only target enemies that are actively attacking a tenno. You could be in a room of enemies and press this ability but if none of the enemies around you are actively attacking a tenno and/or alerted none of them get affected.
What i would do for each ability's augment;
Shuriken: Strips armor.
Stealth Ability: Allows you to see the area enemies can "spot you."
Teleport/Disguise: Keep the same/Use the enemies weapon instead of yours until disguise is broken.
Shadow Clones: Enemies that survive the damage receive half of what the damage was in the form of Slash and/or Bleed status (unless immune).
i'm not sure which ability, should everyone like my proposed changes, should be the subsumable ability as this change will make Shuriken useful.