Over RMS watt

The problem I have is that I am planning on running a 4 channel amp that puts out 4 x 50W RMS.  This much power for the rest of my speakers is fine but I have a set of Kicker KS35's for my front dash with a 20W RMS and a 40W max and I know I shouldn’t be hooking them up to this amp under normal conditions.  What I am wondering is if there is a way to drop some wattage out of the amp so I can safely run those speakers off of the amp or should I just run that pair of speakers off of the deck instead.  To be more specific with the amp it is a Lightning Audio B2. 300.4 900W max 4-channel.

There is actually one more question I had that I forgot to add.  I was just wonderin just how far away I should try to keep the 2 sets of RCA cables I will be bringing to the amp from my deck from the power that will be running to the amp.  Also, should I do the same with my speaker wire which is oxygen free double insulated 10 awg twisted pair speaker wire.

Just power them off the deck- or upgrade the speakers.  Trying to drive those speakers off an amp will do little good if they survive, and they seem like they'd be matched to pretty much any head unit.

It's usually rare to have any problems running RCA's together with power wire.  I use the word usually because I have seen instances when this caused noise.  The rule of thumb is a minimum of 18 inches (many people just recommend running them on the other side of the car).  Keep the power and remote lead together, and the RCA's and speaker wire together.