I think, in general, the best strategy is to get on the seniority list of the best possible carrier as soon as possible, forget the LHS, do not under any circumstances delay your date of joining. Going after a command at a LCC without actually planning to stay seems to me the wrong choice.
I am stunned to still see guys e.g. heading east to EK, EY,etc " to get a command first, and then look for options" , without actually realizing that should they decide to come back they still have to join the end of the line..
( I don' t want to be a smart ass, I fly myself with Cpt's at CX who are younger and have less experience, but simply joined immediately)