IMHO and experience, from worst to best you have:
hot glue - worst and most useless, it changes geometry of the board, it's difficult to put it under the traces and, of course, the biggest problem it is that is not heat resistant and the transistors there will get hot and spread the heat trough the traces ( this is why actually the original PCB glue gets weak round hot spots).
super glue, aka cyano-acrylate, it's excellent because it's very fluid and easily goes under the trace, and when it grabs, it holds
. It also has reasonable HF proprieties, but I suppose you don't have to high of a frequency there. The main weakness it's that it doesn't have long term heat resistance and become brittle, but could still be considered if the temperature it's not so high.
epoxy, two components glue it's the best IMO if you manage to find the one that when it's cured it becomes transparent glassy, not darkish colour, that is, it doesn't have any added powders for extra mechanical resistance. This type of glue has real strength and it will protect the are good, very good heat tolerance and can be applied relatively easy before polymerization and curing.
AS usually, IMMV.