I like Dark Hunter for a second tree for 16 Artificer build, for Artficier if you go T5 BE.
4 DH
Dark Hunter 27
DWS 6
Nets you:
+3 Imbue
+1 SD Dark Hunter
+4 SD DH Tree
+3 SD DWS
+20 Morale to RP (very easy to keep up in quests)
Rapid Shot
Precise Shot
Bleed the Weak (back up imbue for lightning immunes)
4 Rogue for instance would be (Assassin tree):
27 AP Assassin
6 AP Elsewhere to get some small extra benefit
+3 Imbue
+2 SD Rogue
+4 SD Assassin
+20 Morale to Doubleshot (weaker to me on repeater than 20 RP)
Lose shot on the Run can't fit that in
Dark Hunter is stronger than Rogue for Artificer 16 T5 BE.
AA sucks outside of 4 Imbue dice, basically not worth anything other than that.
If you go 15 Artificer then Dark Hunter 3/Rogue 2 nets you (but you lose either reconstruct or deadly):
Assassin 11
DH 17
DWS 6
+3 Imbue Assassin
+3 Imbue Dark Hunter
+1 SD Rogue
+2 SD Assassin
+1 SD DH
+3 SD DH
+3 SD DWS
Lose Free Precise Shot
Lose Shot on the Run swap for Precise Shot
So, you net out with 6 imbue dice, 10 SD, which get you +3 imbue and +2 SD compared to 4 DH, but you lose shot on the Run +6 RP, and the +20 RP from slayer in the dark, and of course you can't take Deadly and Reconstruct.
I think it ends up being a bit of wash with the loss of -26 RP compared to +3 Imbue, +2 SD, and you have to give up either Deadly or Reconstruct.
You were probably talking bows, but for crossbows it makes a nice second tree when Artificer really doesn't have a great option for pure in my opinion.