I am tired to hear that Dr Strange, Goku, Living tribunal etc etc can defeat Alien X.

I am also waiting for those three aliens powerful than Alien X to join Ben Ten.

YOUR ANSWER

I want omitrix to be able to scan anyone and everyone even energy beings as Dagon or Gwen and even non sapient being as ants , etc.

Omnitrix should be based on living essence and not on DNA.

And it should have a feature that should allow user to have mental level at least that of a human.

In simple words I mean even on transforming into cow Ben should have intellect of human,and on tranforming in Brainstorm he should have intellect of Cerebrocrustaceon.

OR

Transformation type Intellect

Non sapient =============================== Equal to user's own level

Sapient ============================= Equal to specie being used

There is no "more powerful alien than alien x" transformation.

Dwanye McDuffie (late) claimed that there are atleast three different aliens stronger than Alien X in omnitrix

That is why Alien X was made weak in Ultimate Alien by saying Osmosians and Darkstar (Mickle Morningstar)can absorp his powers.

Osmosians=======As show might say Aggregor

Darkstar =======In one episode Darkstar was absorping power from Kevin,Ben as Humagousaur and from a plumber.Kevin suggested Ben to transform in to Alien X.And Ben replied that nothing would be left if he might absorb all that power.Episode

DARKSTAR RISING From Alien force series

Alien x is most powerful alien, Dwayne McDuffie's statement is now retconned in UA episode forge of creation.