If you ask any professional player what the single most important skill in an arena battler is, they will all give you the exact same answer.

Playing the game without knowing how much elixir your opponent has is like playing poker without looking at the cards on the table.
Knowing When to Strike
However, if you launch that exact same 8-elixir push when you know the opponent has only 2 elixir, it is mathematically impossible for them to stop it.

Once you know you have a +3 or +4 advantage, you are no longer playing a fair game; you are executing a mathematically guaranteed victory.
You are literally gambling with your trophies.If you are up by 4, launch your win condition immediately.If you are DOWN in elixir, play hyper-defensively. Mental Arithmetic Under Pressure
You must train your brain to do it subconsciously, starting with simple approximations before moving to exact numbers.

When they drop a heavy card, like a P.E.K.K.A (7 elixir), tell yourself "They are now Low Elixir."
Game PhaseThe MathTracking DifficultySingle Elixir (First 2 Minutes)1 Elixir every 2. For more regarding tower rush have a look at our own website. 8 secondsEasy to Moderate; plenty of time to calculate trades and track generation in your headDouble Elixir (Final Minute)1 Elixir every 1.4 secondsExtremely Difficult; the math changes so fast you must rely on instinct and 'feel' rather than raw numbers The Invisible Scoreboard
The elixir bar is the true, invisible scoreboard that dictates who is actually in control of the match.

Knowledge is power.