Recommend to try it on your friend with friendly duel and ask to check def value. The highest value should apply first.
Archer is discussed a lot. Player Saka Exlimit made several simulations for archer skills.
Ranger’s Critical-shot-buff beats all
Ranger’s Critical Shot buff for crit is the best damage increase buff currently.
You need 200 crit rate (after enemy def) to make crit-shot buff defeat all other buffs, including maxed sneak hit. Final crit rate of 200 = ~25% crit chance.
This simulation shows damage increase (expressed as % difference from 100% base), and crit rate. Lines indicate the buffs.
Ranger Critical-shot-buff blue line.
Sneak hit max skill level, and low skill level (upper/lower limit), pink line.
Orange line swift step buff. The difference between swift step 10 and 15 is low, so it was averaged.
I put English on this graph for you to read.
Physical Attack vs Crit attack vs Mixed-increase: physical attack beats all
Regarding Phys attack vs Crit attack, it’s always stronger to have physical attack increase.
Simulation below shows equal phys atk and crit attack (8000) on character.
With 200 crit rate from gear + char level, vs 200 enemy crit resist.
11k physical def enemy taken for simulation.
Average DPS numbers are compared to find the stronger option. Higher number = stronger option.
A phys attack of 10k (+2000 from base of 8000) beats a big increase of +8000 (final 16k) crit attack.
Phys atk increase beats mix-increase of equal-total value too.
It is possible to correct for all archer cards/buffs/debuffs on the simulation but it does not matter which cards/buffs/debuffs are used, the result is similar: phys atk beats crit attack, and phys atk beats mix-increase.
For PvE damage you should not go DEX (crit attack) unless you need attack speed (quarrel-builds, reiter).