I have 555hg, 556, & 555S, and I like the 555hg the best.
Thumb hole opening works better with gloves for me & despite of thinner profile due to hollow ground, it hold usable sharp edge longer than flat ground of 556 for my use.
I find serration works better with ropes & plastics; however, I realized that significant amount of cutting edge seems lost by having serration to such a short blade of mini Griptilian.
I'd recommend 555hg overall for general purpose as well as for the tasks u mention above.
***addendum: If you don't mind D2 steel & slight more weight, consider 15030-x bone collector small axis plain edge.