I prefer the 18/18 cav builds myself. The difference between 5 and 6 athletics: with 5, you are 'as fast' as most players. With 6, you are faster and fighting multiple opponents becomes much easier, because you move faster and are able to control fights with footwork better.
But it's a matter of personal preference. What's 'good' for you and what isn't really depends on your playstyle.
Level 30 (4 420 577 xp)
Strength: 21
Agility: 18
Hit points: 56
Skills to attributes: 8
Ironflesh: 4
Power Strike: 7
Shield: 0
Athletics: 0
Riding: 6
Horse Archery: 0
Power Draw: 0
Power Throw: 0
Weapon Master: 6
One Handed: 1
Two Handed: 1
Polearm: 156
Archery: 1
Crossbow: 1
Throwing: 1
This is my build on ceph. At level 31 I put 3 points in riding, hardest hitting lancer ever.(click to show/hide)
Meh as cav my build for the last few gens has been this.
In my opinion a courser is better for lancing and an Arabian is better for bump-slashing.Arabians too fragile tbh Destriers best for 2 handed.
I personally don't like the build (but I'm certainly no expert). With my build sitting above I didn't convert any skills to attributes. So you have 3 more str, and 1 more WM than me (and 1 more power strike). You have no shield, no athletics, and no 1h proficiency. I don't think you need 155 polearms vs my 126...and I'm still able to get 92 1h out of it.That extra wpf is well worth it, my weapons break less therefore less repairs and my lancing is much faster even on foot when i do dismount(rarely), that 156 means i can spam ppl to death with the staffs.Also i perfer no ATH on cav to no IF nand i dislike hybrids in general so i woulldnt have gone 2 handed as well if i could.
I prefer my "balanced" build in theory.
If you were a polearm footman (like the OP) and wanted to not have any riding, I would go with beothed's build and make a lot more str and power strike.