Thank you for your query about gravebumping. Regarding the specific situation you've described, there isn't a "yes" or "no" answer because there are other factors that come into play when an f mod makes a determination about gravebumping.
As for your second query about f mod and J mod tools, we are not allowed to discuss them. Arch summed up the reason a couple of days ago when another forumer inquired.
In order to discourage abuse of various kinds, Forum Moderators are expressly forbidden by Jagex from discussing the tools that we have available, so it is not possible to answer your question, sorry.