Go with six potency mods on teebo and Rex, potency primary on cross and speed primary on arrow, that will get you in a decent spot, even if you hit the mod table to farm a specific shape versus challenges. The set bonuses are what your after, so to start even low dot mods will work, but you want five dot mods ideally, especially for arrow and cross slots.
Qgj has a fairly high natural potency , so even one potency set and two say health sets will work decently, speed arrow and potency cross.
Always remember secondary stats, speed is good but potency is also ideal
As for wiggs, mod Biggs with as much speed as you can, then health and protection lastly offense hard numbers , no percents for secondaries. Mod wedge with as much offense hard numbers, then health/protection and then speed,