One design that I occasionally use that might be of use:
http://br.sidoh.org/#reactor-design...out=2G3E4GCEC2GECXCXC3ECXC3ECXCXCE2GCEC4G3E2G
In effect, it's a typical X reactor with cryotheum/resonant ender optimized and corners filled with graphite. When I don't care as much about efficiency and just want power, I go for something like this:
http://br.sidoh.org/#reactor-design...ECGCXCXCXCECXCXCECXCXCXCECXCXCECXCXCXCGCECECG
Dropped fuel efficiency, but it's got more raw power output.
I took a look at your reactors and I started playing around with them.
The second one is very inefficient but does produce RF at an incredible rate.
I edited your builds and found I could push a little more RF out of each if you want to look at them now.
http://br.sidoh.org/#reactor-design...out=2G3E4G3C2GECXCXC2E2CX2C2ECXCXCE2G3C4G3E2G
http://br.sidoh.org/#reactor-design...t=G5EGEXCXCX2ECXCXC2EXCXCX2ECXCXC2EXCXCXEG5EG