Is there any way to extend the Eldritch scions bloodrage type ability?

[Helaman]

It only lasts for 2 rounds and then I need to spend another arcane point (Eldritch pool) to then redo it again... seems very sucky given you also need to pay a point for spell strike

[SheepishEidolon]

Eldritch pool only unlocks bloodline abilities, so personally I'd only use it when I really need the abilities. That might be the first round of full-attacking (aberrant: staggering critical, abyssal: claws etc.), an incoming dangerous effect (aberrant: aberrant fortitude, abyssal: demon resistances etc.) or a specific foe (arcane: disruptive bloodrage, celestial: angelic attacks etc.).

As I read the ability, it's not a rage effect. So you can combine it with any rage effect, including real bloodrage. Might be nice for a crossblooded bloodrager - get one 1st level power from crossblooded and the other from mystical focus.