Should I define load combinations for forces, reactions, and deformations separately?

Midas calculates force, deformation and reaction from the same load combination.  No need to define multiple combinations for that.  This is just to show which load cases give what type of result.  As an example, tendon primary will not have any reaction.  Reaction will only arise from secondary force, which is tendon secondary.  Thus, even if a load combination has tendon primary load case, it basically wouldn't contribute to the reaction.