Are the benefits of 5 experiment worth it

Is it worth keeping 2 extra low value units in order to activate 5 experiment? I often find myself holding units such as Mordekaiser that Ill only have space to play on 9, but is it worth dropping down to 3 experiment to include more 4 and 5 costs?

Thinking about it, 5 experiment gives one extra experiment effect and some health, but most of the time the effects are diminished by one of them being on a useless unit.

What are your thoughts. Like dropping 5 experiment for higher board quality and support traits like emmisary garen or ambessa and stronger frontline for twitch to scale doesn't sound that bad.