Hi

[surfing]

From L50 to 85 takes around 50 plat if you use luck vanity.
You will need to buy the 'Host all game instances' elixir and a Endgame pet such as Lat'ko, Peri'Winkle or Dev Dragon.
These pets will cost you around 5-11m and the best would be Dev dragon.

From 85 on to 100 is a bit harder, well alot harder. It's a grind that will take a while unless you have plat to spend.
I would suggest you to use the daily blessing and wait for 4x or 3x and grind on from then.
There is a special tactic to use where you stack every mob in the map (octal bog) and then use an AOE staff to kill them. I am not very familiar with this tactic myself so someone else will have to explain it.

GL on the lvling!

[Ripanda]

I would suggest you to use the daily blessing and wait for 4x or 3x and grind on from then.

I would agree with all of it except this, that is because daily blessings no longer reward 4x combos good luck with levelling also