Have you played Hoplite c1 with Cata, or Sword c2? I have played both, and I can tell you two things:
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Stabbing stays useful forever, even at skill level 5 ( it would be a good investment even at skill lvl 1 due to the quick multihit ). Finestra 5 may not have 100% uptime, but it’s only down for 5 seconds. It also gives 3 AoE ratio, which is incredibly useful ( and +10% block ).
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Restrain lvl 5 from sword c2 is absolute garbage, and you will almost never get a stun proc off of it. I can’t see any reason to take swordsman c2 in any build, if you’re not going c3.
Have you ever actually tried to use cross guard block, and then capitalize on the debuff afterwards? It’s a combo no one actually uses, because it’s so hard to actually use. If you block or dodge the attack, the “parry” effect doesn’t go off, there’s no reliable way to get it to happen without spending so much time you waste your potential DPS.
Also if you use crosscut on a Cata, you dismount. Then your pet can run off and attack something random, leaving you to have to go chase it down to remount later. It’s not very fun. High2 Cata just doesn’t have that great synergy. You’re really going 2 ranks in Highlander just to spam skyliner while mounted. If this build was the be-all only non-worthless Cata3 build, I assure you you’d see a lot of people using it in kToS. There’s a reason you don’t see it that often though ( and several people did try it, but gave up on it ).
You talk like you’ve researched things on paper but I really doubt you’ve thoroughly played the classes that you’re pushing on other people.

