Do I really need High Level Enemies SIC Edition?

I have been using high level enemies unscaled from the nexus and I like it.

I use Falskaar and HLE Falskaar.

I am going to be installing Skyrim Immersive Creatures.

Do I need High Level Enemies SIC edition for the mods to get along?

I would prefer to keep using the mods and choices I've made that I understand and just add in this 1 more mod.

I see that HLE asks if I have Skyrim Immersive Creatures installed.

You probably should use the SIC edition. I use HLE without SIC. HLE creates new variants of the various NPCs (creatures) and adds them to the various leveled lists. SIC adds new creatures and adds them to the various leveled lists. I don't know how this would work out when you build the Bashed Patch and it merges the changes, but you would likely get regular HLE variants and SIC's new creatures all added in together. So, you would essentially undo some of the changes made by SIC.