JOE P.R.C

I know I asked before about SRP pistons and some people said that they were not good piston, Im having all kinds of problems right known. the car is using a lot of oil and the power I not the same as before it drop a lot. I hae SRP 10.5.1 CR pistons dome top and I've heard the problems Im have could be because of the rings,valve guides,head gasket they said it could be one of these. I done a compression check and it builds up quickly but drops down like a minute had on a clock. and the #1 cylinder which has wet deposits on the plug has the weckess compression. Please Help!!!!