for dead bug, tin pad, tin wire melt together, and be really steady with it
for board mounting these beasts I have tinned pads with minimal solder, fluxed part and used a heat gun and tweezers before, its wonky, its scary, its possible, though in best case I would rather use something without forced air heat, like a hotplate, or IR
course your best bet when you get to that is solder paste, though I know its a PITA to keep around the house for one or 2 things once in a while ...