Not too picky about gin. Plymouth Navy & Hendricks are great but any you mentioned will do well in a g&t. Usually mix 1/3 gin 2/3rd tonic by eyeball. Fill cup with 1/2 ice, float cubes with booze, add tonic, 2 splashes bitters in a cocktail glass or other small cup, 4 in a solo cup. 1 lime wedge for small, 2 for big. Sip then adjust to your liking.