Overall, sure. But if you're trying to recreate a Fighter-Cleric like this 2E NPC, then you're after the Ranger's fighter-y stuff, or the Fighter's fighter-y stuff, and especially Extra Attack... Not so much casting or cantrips or Swarmkeeper abilities.
I was just putting that Ranger/Cleric build out there as an alternative "Warrior Cleric" to a Fighter/Cleric, if they were interested in being a slightly better caster at the cost of being a slightly worse fighter.
(But yes, Swarmkeeper Ranger is a good combo with something like Stars Druid or Arcana Cleric, for example... Lots of options for WIS-based attack rolls that trigger Gathered Swarm.)