1) like statted padded robe. the main reason for this:
all monsters got a melee attack + a charm.. the charm can be an element or a heal charm.. meaning every monster got a melee but only 5/8 of the monsters (if contributed evenly) got a casting attack.
so you simply take like 60% more melee dmg.. this is the reason that you need more melee defence than casting defence and to answer
2) you want a scale over a leather over a chain (chain got more melee defence than scale but quite a bit less casting defence which is leading to too much dmg taken by casters) over plate/padded robe over robe
you can compensate the weaknesses of the armors quite well if you stat enough int on a chain or enough vita on a leather.. but imo the scale got the best starting defence contributions.
3) like pat said: you need good ee heals.. the statting is totally depending on your playstyle.. if you -
whistle: you can be ok with healback only (with a good tank and overall group).. if your group or tank isnt too good you can additionally stat up to 50 int or possibly 70int (which is pretty much).. keep in mind that the int is helping more than a bit more ee if you got good heal charms allrdy but low int (1 int =/= 1ee in that case)
explore: it could be that you need to stat multi heal but keep in mind that multi heal will be a lot less effective if it comes to dmg because you can charge healback with attacking but you need to heal a lot to charge multiheal up.. so it kinda works against your dmg. i never did multiheal because my healback was always enough.. if i tanked and had a bad group i added salvation and statted up to 75vita + 50int to be a really safe tank + good healer.. stat/int charms can be a good boost to your healing power too.. healmastery is only useful if you got a bad heal charm.
4) you should be able to change the lvl of the players in the group tool.. you just have to w8 a bit sometimes or click several times
5) the monsters of your map increase their lvl together with you.. this doesnt work unlimitied though.. the max monster lvl of a map is calculated with the following formula: (tier of the map + 2) *5.. for example: tier V map(lvl 10 req) is increasing the monster lvl up to (5+2)*5 = 35.. meaning you can play the map well up to lvl 35.. if you go on playing at lvl 36-37-38 you will get less and less exp/profs/drops.. with the +21 lvl map your map can produce monsters up to lvl 35+21 = 56
i hope that explains your questions.. feel free to pm me if you got any more questions
