Not the best choice of resistors. Personally I don't like that style.
Make 2 banks of 4 resistors in series, for 4 Ohm's total per bank.
That will be about 3.6 A per bank (52w total per bank).
Then use one mosfet per bank. And keep the heat sinks separate. No need for a heat sink, because 3.6A won't get the get hot.
Keep the MOSFETs tabs isolated from anything electrical.
G-