The Comscope crimper is quite nice. Used one, but it belonged to the company. My 20-year-old lightly used Ideal crimper works fine too, but isn't as nice to handle.
If the connections aren't in a protected environment do yourself a favor and fill any jacks with clear silicone grease to keep the oxygen out of the connections.
2015 Nissan Frontier S King Cab, 2.5L, 5MT
Pennzoil Platinum 5W-30 in the crankcase. Red Line in the gearboxes.