You can get to the island in the north without going through the Fog. All my party were alive so no option but too, but the way I did it was having one person with teleport and 3 Pyramids. Have two party member's chained with one Pyramid and leave them to the side. Then with your party member with teleport holding another pyramid and the forth member with third pyramid. The broken bridge strut's all have a very small space you can teleport your forth party member too. So do this, then with the Pyramid on the party member with teleport ability move them up, rinse and repeat to get to end of bridge then use the third pyramid to bring up your other member's. In hindsight the Huntsman Tactical Retreat ability may also have enough distance to allow you to just work with two pyramids, but not sure if that has enough range.
If you don't have a third pyramid or huntsman ability does not have enough range, once you get across there is a way shine on the island so just discover it then teleport everyone to it.
Another one that come's to mind but not sure if it would work. If you just take Fane across though the fog with a Pyramid and leave the rest of your party with the other pyramid then port them over once Fane reach the other side, but as I say I did not go that route as i did not have an undead member.
You can do similar tactic for shrikers there is space around the shrikers range in the pits to get around to the bits you need to, so use teleport / Tactical retreat then Pyramid to bypass them entirely.
Earlier on for the slightly harder battle's I found summon's can help to draw aggro if your dying quickly. A ranger build on someone also work's nice, so you have two member's focusing on physical and two on magic. The ranger could replace Beast's hybrid build and help wear down the physical armour so your red price can taunt them if he has enough health. But then again so many ways to play / setup's, all part of seeing what work's for you
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