QueryBuilder - TagID vs property operators/predicates and sub tags evaluation

Hi,

I am on 6.5.12 version of AEM, noticed that using tagid as A, results in unclosed resource resolver and using B works fine . But using B means i will have to add the like operation to it.  Tried this using Querybuilder OOTB

Question-
1. Is there an alternate way to achieve subtags retrieval if parent tag is chosen?
2. I could think of "like" operator but Is "like" operation ok for performance reasons?- option C
3. Does anyone else notice the unclosed resolver warnings using "tagid"?


A. 

path=/content
group.1_tagid.property=cq:tags
group.1_tagid=properties:style/color
group.2_tagid.property=cq:tags
group.2_tagid=properties:style/monochrome
orderby=path
group.p.or=false
p.offset=0
p.limit=-1

B.

path=/content
group.1_property=jcr:content/@cq:tags
group.1_property.value=properties:style/color
group.2_property=jcr:content/@cq:tags
group.2_property.value=properties:style/monochrome
orderby=path
group.p.or=true
p.offset=0
p.limit=-1


C.
path=/content
group.1_property=jcr:content/@cq:tags
group.1_property.value=properties:style/color%

group.1_property.operation=like
group.2_property=jcr:content/@cq:tags
group.2_property.operation=like
group.2_property.value=properties:style/monochrome%
orderby=path
group.p.or=true
p.offset=0
p.limit=-1