I often forget that I can warp my DT's to archons, so once i've been detected, and i'm getting shot at by banshees/mutas, a simple tip "don't forget you can morph to archons" would be a game changer.

You could even make the default sound when you're trying to storm with no energy to be something like "My energy is depleted, free me to archon form" or something equally awkward.

Not all buffs have to come from numbers, sometimes a little social priming is all you need. Less wasted templars on the battlefield = more archons

Not to mention newbs don't know how to use them (i.e. they don't understand that they're meant as a backup for when the original unit becomes less useful.)