I prefer lighter lines, for a jigging combo i wouldn’t go over six lb test. Since you are going to canada you probably are going to need to be able to flip some rocks over to get your jig back so I am going to suggest 6# Fireline, you will not lose a fish from your line snapping. You dont need a leader, no swivel, fireline straight to the jig. If it was me I would cast smaller raps/cranks with this same combo, once again no leader or anything extra. After catching a fish give your lure a good tug as toothy fish can over time begin to slowly wear on the line, and you dont want to lose that next fish, because those are always the trophies. But to answer your question if you are casting cranks for eyes and pike, as long as the pike arent piggy monkeybutts(15# n up), you will be in good shape with the 6 lb line, just keep your drag down. Doing some trolling, dont waste your money buying a ton of spinners; use that money to buy a bunch of hooks, swivels, and probably 3/8 oz lindy weights (possibly 1/4 or 1/2 oz depending on weather, depth etc), you are probably going to need them . Once again 6-8 lb fireline would work well. The only time I would go over ten pound test is if I am expecting to catch big fish. But dont think if u want to catch a ten pound walleye you need ten pound line, this is not the case. Make sure you really give your knots a test by tugging on your hook pretty firmly, fireline likes to slip from time to time, once you feel your knot is solid, game on. Once again good luck and post some pics