If you are using offensive chants with Kana, a large shield is not such a good idea bc. the -8 accuracy hurts the already not very high base accuracy of offensive chants.
Interestingly enough (only with offensive chants) you can use a one handed single weapon which grants +12 accuracy for weapon attacks but also for offensive chants. I give Kana plate armor and a single hatchet and only switch to hatchet + small shield when he's under duress.
Your Kind Wayfarer should focus on heavy hitting one handers to maximize the potential of his FoD strikes. You only have 2 per encounter, so it's best to squeeze the most dmg out of that - also in regards to Strange Mercy (heal on kill). The mechanic of lashes (have to overcome 1/4th DR separately, no MIN damage, DR bypass does not apply) makes it so that higher base damage (heavier one handers) are much better with FoD than the light ones.
Not so great: flails, daggers, fists, stilettos, hatchets, clubs, rapiers
Better: sabres, spears, hammers, maces, swords, battle axes
But of course it's best to use the weapons with the highest quality and with the fitting weapon focus first of all. Because if you miss your lashes will miss, too. And if you graze the lashes will have less physical dmg to be based on.
Unique enchantments don't make a big difference that early in the game (see Gaun's Share).
War bow on Cipher is great. There's a unique war bow in Copperlane (merchant) named Borresaine which is good. I would only switch to a gun (arquebus) for alpha strikes against weak enemies at the start of battle if that's what you want. Too much hassle for my taste, but it can give you an edge.
For Ranger the best two weapons are Persistence (get it asap, it's rel. early in the Endless Paths, use MIG gear and buffs because wounding scales with MIG) and Stormcaller (White March). Before that Sagani's Massuk Hunting Bow is good because it has dual damage - unlike normal bows. So usually, on average, it will roll better dmg numbers than anything you can get before Persistence because it picks the lower DR to overcome (pierce or crush). You will get the same with Stormcaller (shock/pierce) but way better.
A nice thing about Persistance is that it automatically unlocks Predator's Sense of the Animal Companion. And in PoE the Animal Companion's base(!) damage scales with level. This means the bites of the fox will reach pretty high dmg per attack (albeit slow) which works very well with the +50% dmg bonus of Predator's Sense. Never forget the Animal Companion.
I personally love to give Durance the best arquebus I can find, Weapon Focus Soldier, Gunner, Marksman and Magran's weapon talent that grants him +10 acc with sword and arquebus. That talent lifts him to the accuracy of fighters alone and makes him a pretty good shot, especially if he opens combat with Inspiring Radiance. Later I even give him Runner's Wounding Shot and Interdiction. The reason is that this lets him contribute really well to fights even without casting one per-rest spell. His RES is already high so his deflection usually isn't the lowest one in the party, meaning he usually doesn't get bothered by enemy rogues/barbs/rangers a lot. So I can afford to give him no shield etc. As backup I use a sword + shield setup (sword also has +10 acc) or Firebrand from Forgemaster Gloves (3/rest,works with any weapon focus and with the magran talent's +10 acc, too).
Best enchants on weapons is lashes and quality. If you can get a speed weapon that fits your weapon focus etc.: great. Wounding, too. Marking weapon on a Paladin is great, pick Coordinated Attacks then, too. For example your Kind Wayfarer can wield Shame or Glory + another sword. Most other unique enchantments aren't that important quite frankly.
If you plan to pick an elemental booster talent (Scion of Flame etc.) you should put the fitting lash on a weapon. Scion of Flame -> burning lash. The lash on the weapon then gets boosted from 25% to 30% (*1.2). Lashes are a multiplicative dmg bonus, so this is good.
For example a Paladin with FoD and Intense Flames (50% burning lash and 25% burning lash) should also pick a 25% burning lash for the weapon itself if he plans to pick Scion of Flame. This would boost his lashes to +60%/+30%/+30% which is great.
If you don't want to pick one of those talents you can put whatever lash on the weapon. Sometimes it's good to have some alternative damage and not put everything into one element - just because you might meet resistant foes.
---
Btw: a Kind Wayfarer's best setup usually is dual wielding because of White Flames' healing procs. BUT with Strange Mercy (heal on kill) it can be better to use Firebrand (from Forgemaster Gloves and/or Belt of the Royal Deadfire Cannoneer). It's does enormous base damage and gets boosted by Scion of Flame (because it deals burn damage). With FoD and Intense Flames it deals enormous(!) damagee per hit (but only proves one healing with White Flames). You can kill enemies very quickly with Firebrand - and while White Flames' will only proc half as much (2 instead of 4 times) you will have a lot more procs of Strange Mercy.