which wepawn for flins

I'm F2P and whats the best weapon for flins? i know it's probably the prospector's shovel at r5 but i just so happen to have a spare calamity queller thats been untouched in my inventory (from a weapon banner that i lost) and i checked videos on yt and i cant really tell which of the two is better since the results kind of vary between the other one and the other one so i hope yall can help me 🙏 and if yall need to know my team comps for some reason it's Flins-Bina-Fischl C6 and Sucrose