Guild Wars 2

For PvP/WvW. It just feels incredibly clunky, and the skills are all so similar and unvaried. I really love the flamethrower. TK, Bomb kit and EG are okay too. What are my options for PvP and WvW?

Well to be decent in basically any game mode except some cheese situations(decap/turret) or hipster builds(static discharge) you need bomb/grenade. Some may argue that elixir gun is good dps but it’s really too weak to be your main kit.
Most engineers take toolkit and then pick a main dps one between bomb and grenade, traiting their explosive line around them. You can take both obviously but keep in mind that without grenadier the grenade kit is useless.

Elixir gun + bomb kit + tool kit

6/2/0/4/2 or 4/4/0/4/2.

For pvp, rabid amulet + rune of balthazar.

For WvW, rabid armor + rune of the krait.

Pistol+Shield with sigil of battle and sigil of earth/geomancy/doom/energy/tormenting

This route is pretty decent.