Land rate of physical skills that don't use SS

I'll use arrest as an example.

Arrest is a physical skill that doesn't use SS. You can speed it up, and lower the reuse time (I believe) with haste, and other attack speed buffs. But is there a way to make it land more often?

Get a higher patk.

No weapon vs weapon doesn't seem to effect significantly (+/- 5 %).

hmm thats a good point. If you can land it even nearly as often without a wep, then I'd say patk doesn't matter at all.

But it could still be effected by your base STR directly

I've been too low level to test it in pvp on equal level toons in pvp. Not many people tend to stay around 72-74...they seem to rocket straight through to 76.

Enchant it......

Provide me with the ~20 M sp I'm missing from leveling up in C1.

you will prolly find that works the same as stun and nothing effects the land rate except skill lvl vs player lvl (then all the add on resists)
as such prolly no way to boost it

I have tested the arrest skill of my Shilen Templar in PTS and it worked nicely on all classes and summons with a quite good land rate... And on live server, it landed nicely almost all the times on a Tyrant on the same lvls as me