yes, having more DP lets you beat Remnants more easily. Cause one of core remnant strengths is their ability to deploy more ships. Their fleets are expensive PTS-wise (double-checked, their ships aren't really that expensive. With radiant standing at the same cost as Pegasus does. 30 to 30 pts. And invictus having 35, though I don't know how significant the increase caused by AI cores is. So my theory may still stand correct... Or not), so rarely will they ever generate ridiculous DP fleets. It's kinda made up for by giving them overpowered doctrine stats. But I haven't checked their config file. That might have been changed.
You can easily swarm remnants, but it usually doesn't work, because they are significantly faster than you, because of how their ships are designed. Allowing their pesky AI to not get as easily cornered. And allowing them to actually benefit from their over-aggressive strategies. Unlike Derelicts or Pirates for eg. Whose ships are designed for clumping and surrounding behaviour rather than rush and retreat attacks.
Players usually deal with this by equipping safety overrides. Utilizing s-mods to outstat them and having equally strong to AI officers with significant range, damage, flux, durability benefits that allow them to deal with alpha core spam BS. If you are having trouble beating remnants. Consider grinding s-mods, using safety overrides, getting more officers, and putting plenty of mercenary officers on top. And switching to ships that are more nimble. Like exchanging dominators for champions, or enforcers to medusae. As slow tanky ships are usually heavily outplayed by remnants... I think??? SO enforcer is probably still good. But SO Dominator is probably very difficult to execute due to how large weapons are designed. Causing it to be unable to fully make use of its significantly higher flux venting stats... Uncertain though.
Generally, armor reliant ships are too heavily countered by EMP (may not apply to Invictus), and then become exposed to ridiculous strike attacks (missiles are usually overpowered), which cannot be responded to, cause Remnants are generally significantly faster than them. Though, I'm sure you can play around this with previously mentioned safety overrides, helsmanship, etc.
In 0.96 I used to use a paragon to hunt down Remnants without s-mods, increasing its mobility through helsmanship, damage control+ effect, and auxiliary thrusters. As well as 0 flux boost to rapidly reposition. And then utilizing plasma cannons to wipe out all supporting cruisers, whilst utilizing warthog heron (still so angry that warthog is now low tech, considering how well it fit heron) + dominator compositions to distract a usually singular radiant and ships I wasn't engaging at that moment... Though that is probably one of the more inefficient ways of doing this.