Species can be dependent.. but my experiance with Pikes.. The Scomb is gonna get harassed. Pike cichlids are generally heavy hitters.. Anything that won't hold it's ground of beat back on them is somehting for them to bully and harass. I tried this with my florida gar, and fire eels.. and my pikes kept the eels cornered off in their pvc tube. and the gar hideing all the time. Anything that will utilize the swimming column is in their territory. Mine where vennys, or black line pikes. The usual species seen. and oen of the most docile species.
And the females are the nastier of the 2 generally. I have a dwraf female pike that beat up my aba aba knife...