This is a small guide I made after playing with Tokens for several dozens of runs in different 5 and 10 combos. I hope it would be useful for those who want easy or challenging runs.

Danger: ★☆☆☆☆
Useful: ☆☆☆☆☆
This token can be dangerous if you use slow and cumbersome weapons but overall, this token can be easily countered with relics and HP/MP Potions.

Danger: ★☆☆☆☆
Useful: ★☆☆☆☆
This token can be dangerous if you use slow and cumbersome weapons but overall, this token can be easily countered with relics and HP/MP Potion. However, it can be more useful with certian relic from ninja set that allow you to deal more damage against enemies under debuff.

Danger: ★★☆☆☆
Useful: ☆☆☆☆☆
It can be pretty dangerous from time to time, especially if you get hit during boss fight. Otherwise it is pretty mild token.

Danger: ☆☆☆☆☆
Useful: ★★★☆☆
This token doesn't add difficulty by itself and in combination with other tokens. This is the safest token of all.

Danger: ★★★★☆
Useful: ★★☆☆☆
One of the most dangerous tokens. You get more coins but you can't get orbs and can rely only on potions and life steal or regeneration for healing.

Danger: ★☆☆☆☆
Useful: ☆☆☆☆☆
Can be dangerous if you are not good against particular bosses. Otherwise, with some experience, it should not be troublesome. Though, an inability to choose special rooms is greater downside.

Danger: ★☆☆☆☆
Useful: ☆☆☆☆☆
Pretty weak assassins that in general just annoyance... And very persistent one.

Danger: ☆☆☆☆☆
Useful: ★★★★★
Like all elites, this one give you some coins and dark gold in general. Danger level is non-existent and quite benificial for you.

Danger: ☆☆☆☆☆
Useful: ★★★★★
Like all elites, this one give you some coins and dark gold in general. Danger level is non-existent and quite benificial for you.

Danger: ☆☆☆☆☆
Useful: ★★★★★
Like all elites, this one give you some coins and dark gold in general. Danger level is non-existent and quite benificial for you.

Danger: ★★★★★
Useful: ☆☆☆☆☆
Probably the most dangerous token out of all, especially if you meet your shadow at later levels. Choose if you want some random challenge. It force you to make a build that would not be hard to deal with.

Danger: ★★☆☆☆
Useful: ☆☆☆☆☆
This token is kind of tricky but overall should not be really hard to deal with. Some enemies can become annoyance with certain weapons (mostly the range ones).

Danger: ★☆☆☆☆
Useful: ☆☆☆☆☆
Never run out of time so can't say how dangerous this fiend can be. Probably it could be dangerous if time will run out.

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There is a way to summon Time Fiends into Chapter-Interlude Room (to strip them from all chapter and difficulty bonuses):
-Beat the boss;
-Activate Portal but not agree to jump into it;
-Wait till Time Fiend timer get to 0;
-Jump into portal.

Danger: ★★★☆☆
Useful: ★★★★☆
Mild risk and high reward token. If you believe in your skills just choose this one for free relics.

If you want an easy 5 combo run (for free charm at the end of succesful run) I suggest:

• Long Journey
  
• Gravity Elite
  
• Blinking Elite
  
• Diamon Elite
  
• Time Fiend

This would give you more money, more orbs and more darl gold. You can change Time Fiend for Blazing Song or Toxic Pharmacist if you believe that you can avoid those status effects.

You should avoid Shadow Within token if you don't want to fight uphill battles with your clones. While your Shadow is pretty weak on early levels, it can become extremely strong or even impossible to beat. If you still want to play with this token, avoid getting relics like Heartbane Maggot or Abomination Sac. You enemy will have bonus HP based on level progression and difficulty which would make it very hard to deal with shadow if you get counter-type relics.

Invading Boss is double edged sword. It makes boss fight difficult but you earn more relics this way. Of course, it is harder to get Perfect Win which can make your relic earning the same.

Glittering Gold is extremely dangerous, especially for those players who is not good with their characters. Overall, it could help to get some good sets but in general you will rely on potions for healing.

Assassin Apprentice is minor annoyance. However, if it is combined with Time Fiend on Demonic difficulty, it could become major annoyance that would eat your time.