Oh boy
For pens I use fountain pens because it works out cheaper in the end with refills and that jazz, for $3 off eBay you can get a jintao lamy knockoff which are actually amazing. Otherwise invest in a good one that will last you the rest of your lifetime, it's a small cost for something you use everyfay
I use skateboard griptape to get better grip when my hands are sweaty because most fountain pens have slippery grip sections
For pencils, again i believe that you should invest a bit for such a useful item. I've got a retro 51 pencil (can't remember the exact model) but it looks exactly like a rotring 500 and has lasted me over a year. I engraved my name on it so noone can steal it (people always try, no chance bruh)
All I needed for year 12 was my one pen and one pencil and they both lasted the whole year of being thrown at walls, used as drumsticks, and being used to stab classmates on a regular basis (all boys school life). Hopefully they last all the way through uni as well, and considering they're both made of metal I give them a strong chance