I prefer Level 47 better since you don't really have to deal with water that much or the bridge like in level 38. Just connect the bricks along the edges and I could have 6 gargoyles by the end of the level.
Remember not to connect any piece that has the potential to brick them all together, so you can have more chance to add more gargoyles. I usually have 3-4 gargoyles by this time. Discard a few bricks if you don't see any gargoyle coming out and remember to spare at least 2-3 last brick just in case no more gargoyle is coming out so you can finish the level and get counted in one sitting. I only had to do it 5 times
See below some examples how i set up the gargoyle