I assumed you were natural but I didn't see your stats. If you posted them and I overlooked them I apologise. In general terms, trying to dehydrate can be a very counterproductive ask unless you can magically induce extracellular dehydration without compromising water levels within skeletal muscle.
Here is a good paragraph from the very recently published review on contest preparation for natural trainees.
"In an attempt to enhance muscle size and definition by reducing extracellular water content, many bodybuilders engage in fluid, electrolyte, and carbohydrate manipulation in the final days and hours before competing [Invalid Link Removed,Invalid Link Removed,Invalid Link Removed]. The effect of electrolyte manipulation and dehydration on visual appearance has not been studied, however it may be a dangerous practice [Invalid Link Removed]. Furthermore, dehydration could plausibly degrade appearance considering that extracellular water is not only present in the subcutaneous layer. A significant amount is located in the vascular system. Thus, the common practice of "pumping up" to increase muscle size and definition by increasing blood flow to the muscle with light, repetitive weight lifting prior to stepping on stage[Invalid Link Removed] could be compromised by dehydration or electrolyte imbalance. Furthermore, dehydration reduces total body hydration. A large percentage of muscle tissue mass is water and dehydration results in decreases in muscle water content [Invalid Link Removed] and therefore muscle size, which may negatively impact the appearance of muscularity."
http://www.jissn.com/content/11/1/20