It's easier to solo when you have more of your skills and traits to work with, but Eles can solo in WvWvW.
The easiest and most useful solo objective for a player in WvWvW is ganking enemy yaks and disrupting supply flow to future objectives. Yesterday I was running disruption in the northeast part of a borderland map, killing yaks for both sides, trying to choke supply to red server garrison and the blue server's keep. You have to do a lot of hit n run, so mobility and escape is of large importance.
You can also help escort yaks, but they disabled the xp and karma gain from doing that because bots were exploiting it. So while its helpful, you don't currently get rewarded for it.
Overall, I solo by flowing in and out of large zergs, then splitting off to smaller groups taking supply camps or going totally solo and scouting activity and then ganking yaks in enemy territory. You can also take NPC camps if you want and take out the enemy guards that protect or watch supply routes.
Look for commanders, see if commanders are asking for help on a siege or defense, watch local friendly supply camps and see if they are being attacked, and watch enemy yak movements to sneak in and take a yak out between drops.