If you're on a tight budget that's strictly dictated and vehemently enforced by a menacing Gestapo officer ...
I'd remove all the parts that you're going to replace (to keep them brand new) and try to sell them off on ebay ... That way there's a chance they'll sell quicker and easier to help re-coup some coin that can be put towards more desirable upgrade parts ...
For instance if the stock rear shock is under par ... remove it , sell it off as new , then buy either a DNM or Fast Ace ... hopefully that'll help to pacify your "boss" ... Convince her that you're actually saving money instead of throwing it down the drain ... You can sell the stock shock , chain , levers , grips , bars and even tyres if they're shonky ...
Why run them only to have to toss them out , when they're worth something to some other poor sod who bought a cheap chinese bike off ebay ... AND who might be actually getting bashed as well as ridiculed and psychologically traumatised by his missus (ie Atomik customer) ...