For cuts that don't matter if they're clean cuts, just about any old pair of combined pliers will get the job done equally well just as long as they're reasonably big enough and not yet completely worn. As for clean cuts, whether they need to be flush cuts or not, the side cutters that I was referring to always are the best option IMO because they are much sharper than any other cutters I have ever seen, and, they stay sharp for much,
MUCH longer than any small flush cutters including ones that are much better quality than the cheap ones by Coil Master or by UD or whatever... maybe the reason why Donald Trump hates European steel is because Americans can't make it themselves, and, I may be an idiot, but I'm a
SERIOUS idiot so, for installing your coils IMO just cut them before inserting them into the post holes or clamps, not after, and use a coil tool (picture below) to insert the coils whilst being extra careful to not start to unwind the wrap wire from the cores. You'll get much cleaner cuts and they'll be more flush, and personally I like my cuts to be ever so slightly recessed into the post holes or clamps because when you pull out the wicks the wicks will come out without there being a juicy fluff of cotton dangling onto the cuts. Peace of cake... peace of mind.