May be wrong bout this but even when archer get good amount of dex every time you lvl having a bit more pump into it will help boost the lifespan the archer stay on the field, since u take less hit n use lesser pot/stone of every enemy
Some of u may say then pumping end will also do the same but since the archer has already a high dex base and a passive skill which also increase the evasion rate. why not work with it
