Ive touched 3 emblems so far in a map….no td…..yet

con for maps:

similar to sc players farming certain levels ( killthemself,loose experience and keep farming , then kill themself, repeat) there is a similar way in HC without dying. With maps.
i love to play the maps "on the cap" . lets say a level 30 map , mobs capped at 55 , i keep doing them until level 64 . Each level your exp halfs , so you can do that quite a while and still get drops. Once monsterlevel +10 is reached, next tier map .

With the changes to Emblems (and new monster abilities), maps are better to complete compared to before.

Some people have issues of not being able to complete maps at higher levels or they exceed the +X% Monster cap for that tier map.

I believe that you have a chance of hitting an emblem that can steal some of your experience, as well as certain monsters (Goocidic being one of them) can steal 5% exp from your character (shown on your XP Bar... thanks to Bigheaded for checking this). ... so exploring certain types of maps at certain tier levels will be better.
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If you ever use a Map that already has +X# Well(s), can you check if you get any Emblems when clearing it, I have completed three(3) of these maps and have not encountered a single Emblem. I am hoping it is just RNG and not a bug.