ok,so...everyone knows what the Adv. Training Hall is,but in that one you can only fight with...some scrap robots,and every type of attack does alwais a normal damage.
for that,today,i've thinked about an expansion for the training hall,a virtual trainer room.

That's the idea:
to enter in that room you must pay 200 crowns (yep...just a little) and you can invite up to 3 more friends,but YOU must invite them.
if they connect they won't pay 200 crowns,and you won't too,once payed you can stay there how much as you want,but when you exit you'll pay again to go in.
well,this room will have ALL the enemies you can find ingame,and there will be a section to do boss training.
Why that? just to test how a weapon would really work with each enemy,and the boss section just to know how to fight well that boss,without seeing an useless youtube video.
you'll be able to change gears when u would like to,while fighting a boss to,but bosses won't drop anything,enemies too.
if someone dies there,it won't cost energy,you can do that,but the computer will track how much energy you have used to revive,and then,when the fight is done,it will show you how much energy you used.
plus,it would be sliced in 3 parts: tier 1,2 and 3.
to pass from the tier 1 area to the tier 2 area you'll have the access to tier 2.
so you must reach depth 8 with every item with 2 stars or more,and then you'll be able to fight every tier 2 bosses as training,and test your weapons with tier 2 enemies.
same thing for tier 2-tier 3.
plus an addictional zone that lets you place monsters/structures,just to test wave fights.

Why should you enter into this room?
well,first of all to study enemy's moves and attacks,to test your weapons with effective damage and to do boss fights without a reward,just to know how to fight em faster,better,and how to take less damage from em.

Second Suggestion: Teleport
thats an expansion for the arcade,using this you'll be able to "jump" levels you don't want to do,paying a bit more energy.

the 1st level skipped will let you pay 10 energy
from the 2nd you'll pay 15 energy.
plus,each depth skipped from the tier 2,will let you gain a health capsule (dont know how to call em...these you can obtain in dungeons that extends your max health) for each depth skipped.

so jumping from depth 1 to depth 4 will let you pay 10+(15x3) that does 55 energy,instead of 40,plus a health capsule of 3 hearts.

Why should developers implement this?
...people will use energy faster...so buying more ce,its like an economy boost.

why should players do that?
tier 2 is hard,until you don't have everything with 3-4(or 5) stars,and if you only want to fight against a boss to get some damn tokens after 2 hours of training in the virtual trainer room,what's better? you jump useless enemies and you fight instantly.

this means that:
finally people will be able to do true training,tier 3 players too,do boss training,test weapons,and skip levels by paying a bit more energy.

how you'll use that(for example):
pay 10+(8x15)= 130 ce to fight instantly against the roarmulus twins with a health capsule of 8 hearts,WHAT DO U WANT MORE?