Not sure if you are talking about the Scytheclaw guys or the gyreworms when you say bugs in deepholm. If its the scytheclaws you can move out of their multipunch since they channel that move and wont chase you while they are slashing away. Barkskin or natures grasp so that they are rooted and dont put dot's on the 2nd mob until the first is dead. Or travel form to get away then turn and root them.
If its the gyreworms you can easily aggro a ton of them in the tunnels. just kitty sprint/travel form away or pop cooldowns and starfall/treants/hurricane them down.