When Gazillion announced Rogue and her power stealing/borrowing abilities I couldn't really believe it. Rogue has 13 power slots to copy abilities from all allies and foes in the game. How cool is that, for one.
Secondly, by having an ever growing list of abilities Rogue can steal, the developer have to continue to update Rogue with every new content released, at no additional income. It is so much easier and profitable, to ship a hero with fixed skills.
Gazillion did great with Rogue and she play great as well.
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It is very helpful to have " /lfg " (looking for group) chat turned on in your global chat. You can get help clearing a boss, free teleport to boss fights, portal to cow/doop levels, etc.
Legendary Quest is great for leveling but not for Odin Marks.
More specifics:
If one is just starting off (1-3 heroes) - just go and play whichever storyline/mode/map you fancy.
If one has 4-10 heroes, you will be thinking of getting more hero synergy bonus. Hero synergy bonus is an XP bonus for every high level hero you have in your roster. If you are here, unlock Cyclops for his synergy.
Around your 10th hero is leveled, if one is feeling burned out it is ok. Rest , do other stuff, etc and when you come back, you'll be thinking about getting better gear for your main/favorite hero.
10-20 heroes: Optimal gear customizing and hunting begins. Events, cosmic terminals and green raids is the go to places. This is also the time to dip into ' /trade ' channel and learn the market. You start to make sense of every line in the 'Stat' page in your hero's profile.
20-30 heroes: You are now aiming to maximize Omega points and Best-In-Slot gears. Hit the Events with your guild/friend list. Your main hero should be Red Raid ready. Temptation to cosmic prestige (a yellow name in chat windows) hits here.
30+ heroes: You are here to join the 'Every hero at level 60' club. :