Persian Rewards - Unit Category Level a function of PP Level?
Is there a simple rule of thumb for the level of unit you can win, much like what appears to be true in the piece drop class as a function of level?
I'm wondering if something like this is true:
PP Level
1-15 - Light Infantry Only
16-30 - Can include Heavy Infantry
31-45 - Can include Phalanx
45+ - Can include cavalry
And then every once in a while, you might get something much higher as part of some bonus (perhaps triggered as part of the apparent jackpot paid out when you've lost enough units at some level of PP).I am also only asking about normal PP levels, not the special ones that are part of some quest/mission.