I realise you are asking which one of those perks to choose but your thread title is pretty much the build I am running
( + GunFu & penetrator & mysterious stranger )
Those skills work so well together that I find it very hard to recommend one over another but I'll give it a try
Grim reaper ( aside from beeing too damn loud when it procs ) is very good and it procs alot so I would definetly take that one over action boy/girl BUT they complement each other really well because action boy/girl is for those situation when the reaper does not proc
Pretty much the same can be said for banker vs. clover - I absolutely would prefer banker because it's just to damn useful to store 2 or 3 crits for 100% headshot accuracy + at rank 3 there is a chance to bank an aditional crit every time you bank one BUT then again clover is the way to actually bank a crit so yeah there is that
If I really had to prioritise those perks for me it would be:
banker > reaper > clover > action boy/girl
but like I already said they really work best together - so my advice: just get em all
it'll take quite a few levels but at some point you queue up headshots on let's say 5-6 guys ( this is where GunFu comes in ) with 1-3 crits banked and by the time you emptied your critbank you'll have new ones for the rest and with a bit of luck ( actual luck not the stat ) banker gives you aditional crits - and with the reaper you can just do it again and again and again and should something go really wrong there's action boy - just hugg cover and wait a few seconds and proceed with the killing
Long story short: Every one of those perks is really good but together they are insane
Edit: I forgot - you asked if you should leave crit banker out - that would be insane - if you ask me which perk on the entire chart i consider the best one - it's banker and it's not even close
At one time I spotted a camp of super mutants in the distance and in the middle a suicider - i had 1% hitchance in vats but I had a crit banked - crit the bomb on his arm and the entire camp went up in flames