hmmm, Somehow I expected a question like this way before.
To the OP. Guildwars is a game where to true challenge lies in making and finding your own build and that of your heroes. The skills you bring and the tactics you use makes you a badly player, an ok player or an elite player. There are a lot of ways to bypass this, but to be truly good at this game my advice is to start constructing your own. From your question I guess you have a sattisfying 8 man build. So this is a great opportunity to start, and though I may sound a bit harsh I will help you on the way.
Typically all team builds have the following structure
4 man area: 1 melee, 1 healer, 2 casters
6 man area: 1 melee, 1 healer, 3 casters and the last can either be a healer or a caster.
8 man area: 2 melee, 2 healers, 4 casters.
Although this basic structure is very old it still counts. The difference is that at the good builds you find on e.g. pvx, they decided to not put one role on one hero, but to spread it. if all or most heroes are healer, it isn't a big problem when your healer dies. if you use minion's as melee it's best to spread them out over e.g. 3 necro's so if one of them dies you don't find your total line of defense turned against you.
In the case of WiK it is a situation where 1 melee, 3 casters and 2 healers would be optimal (or actually 1 melee, 2,5 casters and 1,5 healers) but still with balance and spread out function of modern teambuilds.
So now go and look at your (8 times 8 equals) 64 skills in your 8 man build and see wich 16 skills you can do without. Now make sure you get the remaining skills as balanced into 6 people as they where balanced with 64 skills and 8 people. I garanteu you that you'll end up with a pretty awesome setup. And you did it all by yourself
Last advice. That quest is a nasty sucker. Even with pretty good builds you will need tactics like flagging, pulling and calling targets. My favourite is to clear the groups ahead of the end boss area (in the bigger square downstairs) then i flag my group at the other side using spirits as a barrier. The good thing bout this tactic is that you don't have to bother bout the spawning groups. The bad things is that heroes doesn't always listen to the flag like they should and I loose to many ressurection skills and healing skills on the way to the flag. The tactic Leot mentioned bout going round and using nuking skills that don't require eyesight from the back of the temple works awesome too btw.
ow and like Spiritz said, make sure you have infused armor. It can be done without but out of personal experience I can tell you with infustion it is a lot easier
