Currently fastest way to 90-100?

Hi guys, I changed my mind last minute about which Class I'm gonna Main in Legion. However, this Character is only level 90 and from my knowlege, the XP gain from invasions just got nerfed into the ground. What would be the fastes way to get to 100 now? I'd prefer not to use the XP potion though as I'm not that heavy on gold right now. Thanks.

EDIT: Thanks for the responses, I'll just grind the Objectives. And yes, Invasions got nerfed, just checked again, only getting 3k per "Boss".

EDIT2: About the nerf thing, I forgot to add I'm from EU, so it will probably be nerfed about 1 hour pre-launch in your Regions too.