You can self it, no problems. The spike and the plant will be fine.
If you cross to the kingi, you'll get a D. x delicatum. Most delicatums are very pale pink or even cream. It seems that D. speciosum var curvicaule is the best for letting colour through from the kingis, but the growth form and upright spikes from your pedunculatum would make for a neat compact D. x delicatum.