best way to level before tiling? Under coat plaster?

[gesseg]

Hi ive got a bathroom to tile the tiles start just below the top of the bath. so i need to level the wall to the tile depth.

My thoughts:
1. Try to loose the depth while tiling using extra adhesive.
2. Aquaboard the whole area.
3. Use some sore of QUICK drying plaster to level to the tiles.

Would greatly appreciate your input on this one. Thanks.

[Colour Republic]

depending on depth and how how much the quickest way is to level with rapid setting cement based tile adhesive,

You can't tile on to backing plaster (well you can but only one sort) and most adhesives (even cement based with have a maximum depth in one application

[marc1106]

BAL quickset render! cos its cheaper than using rapiedset!