As you know, recruiting troops gives you prestige.

I've been doing a few numbers crunches and here is what I've come up with.

These are the P/TPS (prestige per troop per second) calculations.

You may also call it Prestige From Recruiting Rating.

These exact numbers apply to only the following:
Rank: Lieutenant, Title: Knight

However, even with higher Rank and Title, the same trend and Prestige Rankings should apply.
You should also know by now that the higher your RTTH (Rank/Title/Town Hall) the less prestige you will gain.

The number of troops you train at a time also affects the prestige rating.

***The higher the rating the better***

In terms of P/TPS (prestige per troop per second)

Warrior: 0.018
Scout: 0.016
Cavalry: 0.0122
Swordsmen: 0.0108
Archer: 0.0069
Transporter: 0.0057
Pikemen: 0.0049

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In terms of PPT (Prestige per 1 troop recruited)

Transporter: 2.9
Cavalry: 2.5
Swordsmen: 1.11
Archer: 1.0
Scout: 0.6
Pikemen: 0.3
Warrior: 0.18

I am currently working on getting calculations for worker, ballistae, cataphract, etc.

I hope this guide was helpful and feel free to post any thoughts/comments/suggestions/questions you may have.