I am not giving out full builds to what we schemed up unless you're a dedicated member.
But basics I can do, linkers are very useful in both attacking and defending in WoE
Kaite
When linked, they can make even novices useful for penetrating a wall of pre-casts or vice versa for breaking up a wiz attack squad, in fact, lv1 novices are probably most helpful.
Kaite allows the affected user to reflect 2 magical attacks at the damage that they would've received, the reflected dmg cannot be reduced.
By buffing your guild with kaite you will destroy most caster classes if they're not careful, though there are a few counter measures to this strategy which I will not be sharing (pretty intuitive though)
Eske
VERY helpful in WoE castles when defending, due to the nature of the restrictions, giving guardians 300% attack will give the attacking guild hell. Many will get 2 shot by archer guardians.
You also do not need to be linked to use this skill. Although this only works on Guardians, not homunculi or mercenaries
Kaahi
Self explanatory, but you'll want to cast based on the class of your target. Since there are no easy ways to heal SP, some classes would prefer not having lv7 Kaahi while others NEED it.
Although you'll find most classes in restricted using skill based attacks which will not activate Kaahi, but there are other ways of using it.
Links
Many unexplored skills in regular WoE are used in restricted, and many links bring out great potential (seemingly broken, in some cases) to many classes
Kaupe
Fast cast time, good if you have a fast reaction. This helps guild mates or yourself at avoiding nuke skills, you'll find this useful against gunslingers or many trans skills if you're doing trans
Eska
Less use, good for when you have Guardian Archers on towers, most will be taken out by wizards and this combined with Eske and Kaite (on yourself) will be a great annoyance for them
We have theorized a build for Soul Linkers to be effectively offensive, we have the basic gears for them, but have not yet tested (that might change today lol) and I will also not be sharing it :x
To be effective (and not bored) it is good to just log an alt, as 1 SL usually can't accommodate everything. One should be links only while the other uses buffs.