Re: How to Chomper
At the point where I am now I don't see a lot of difference between playing the Chomper in GW1 vs GW2.
But I may have learned the Chomper backwards compared to you; I absolutely hated playing the Chomper in GW1. The game was new then and I was already a big fan of the franchise up this mutation of it into a third person shooter so I picked it up and I think I was unnecessarily distracted by the unorthodox, nontraditional, and sometimes fiendishly difficult, Star Challenges required to level up and trying to accomplish some them while having a fun time on the game turned out to be mutually exclusive and I left the game after only about 40 hours of play and hitting Player Rank 34.
Quite frankly at that time I was terrible as a Chomper, or any other class for that matter.
When GW2 came out I had forgotten how miserable playing the first game made me sometimes so I picked it up. With a more traditional leveling up system I was able to get into the game much more and GW2 was where I really learned how to play as a Chomper and the class became my favorite to play and where I get my largest vanquish total along side the Scientist on the Zombies team.
I went back to GW1 after unlocking every other character to be able to add the Unicorn Chomper to my roster so I went back to GW1 with considerable skill as a Chomper and honed my survival skills with it's harsher Health regeneration system and I'm seeing higher vanquish totals now than I did before in GW2 (30-40 average per game of Gardens and Graveyards vs 20-30 previously in GW2) but I haven't exactly returned to GW2 yet since I'm only at Player Rank 242 and I need a couple more weeks to max out at 313 for the Unicorn Chomper.
Once I return for good to GW2 I'll have an extra couple hundred nonstop hours of gameplay on the original so I'll be able to make a better comparison for multiplayer.
What I can say for certain is that at least half the players you meet in GW1 currently are highly skilled at the game at this point so you definitely notice when the opposite team has lucked into having most of those players.