Choco to 90, POGGERS.

I usually use XP-Choc and do dungeons after i did reach Level 83-84 with chocos.

Or tryhard and use chocos to Level 90

or just walk sig 80/84/87?!

I have 4 level 90 characters. I leveled most of them on Doc 80, only got 1 or 2 levels on sigs. XP chocolate has always been working. Also a good trick is saving some of your dungeon quests for leveling after level 80. Of course an XP event is a HUGE help.