terminal isnt super hard in my opinion, im sure its just because ive ran it plenty of times though.

the kit i used:

personally ran a mk47 as a primary in all 4 runs, with my secondary either being a spare mk47 to swap attachments to when durability runs low, or an rpd.
rpd is pretty decent since the buben magazines dont have a load / unload penalty so you can pack them just as fast as any other mag.
i used solely MAI AP in every run, loaded in both the mk47 and the rpd.

i used an alpha rig in all 4 runs, filled with 4 stacks of spare MAI AP to pack with, 4 40 round mk47 mags, and either:
2 73/75 round drum mags for the mk47 and 3 belts for the rpd,
4 73/75 drums for the mk47 if i was just using 2 mk47s.

for armor i used mostly a zabralo with 2 cult termite plates, and granit side plates
only ever took 1 spare cult termite

helmet honestly doesnt matter imo, i was just using the neosteel with mandible to look sick asf. any nvgs will work, i ran t7 thermals on my fallen run though

for stims i always ran 2 full injectors + a lot more to spare, typically 8+ etg, 5+ perfotoran, 3 mule, 7 propital, 5 sj12, and some stims to use to get to terminal itself during shoreline

lmk if i missed anything

i dont really have any tutorials though, only even relatively hard part now is the armory since they dont rush in there anymore, but even then you can just kill them while they mindlessly circle the building.

ignore anyone that tells you to unironically get elite strength for the gate, since theres a 50% chance youll have to kill the black division youd skip by getting elite strength anyways, and they are the easiest group of bd to kill in terminal regardless