I'm not sure we understand what you are after but I have a huge knowledge on this species, Callistemon's. They belong to the Proteace family and have a protiod root system, hate phosphorous, and generally tend to get a fair bit of deadwood.
They generally will have multi-leaders close to the base if not at the base.
If you want to kill it and not have to stump grind etc, just cut it off at ground level and poison the stump with something like Round Up straight after cutting it.
I hope this helps you?