Hi all..
Now my 3 char is reaching the end of RB2... As usual i wanted to shared some of my experiences.

First i want to share the The big difference of RB1 and RB2,

1. You have 1 Combat Pet and you will face multiple enemy (2 from 1-399 adn 3 enemies from map 400 above)
   
2. Exploration will open Bloody Challange which you will get MVP shard 1 (or 2 if you double reward, and you MUST!!) every 20 hours.
   
3. Your combat pet can equip Combat Pet Equip which CAN ONLY BE OBTAINED through forging. the stats bonus are random and hidden so you have to open" the hidden stats, which is free for 5 times.
   
4. Combat PEt can use 4 skills that can be obtained thorugh various Combat pet and level requirement. Thus you need to level GET AND ALL YOUR PET. But some is more important than others. Let me share later.
   

I think that is all the difference. Now I will explain some mechanics

1. The combat pet will serve as your tank,
   
2. When he Dies, trust me you will die in around 5 hit. So thats why many people recommend tanky MVP for combat Pet. Some better choices are DRAKE, GTB, EDDGA, BAPHO JR. For purple some of my friends says that Steam Goblin, DEvilling, Bigfoot are quite ok but never really test it.
   
3. Other than Pure stat, There comes PET EQUIP.
   Please look for HP, DEF, then EVA, It is the most important and have most significant effect because your pet is tank.
   
4. And then Comes PET SKILL.
   THIS IS THE MOST IMPORTANT OF THEM ALL. I believe now you will need :
   • CURE (HEAL 1 PERSON) : ARCHER SKELETON
   • RESTORE (HEAL PARTY): DROPS
   • STRENGTHEN (DEF UP) : SAVAGE
   • GROUP STRENGTHEN (DEF UP PARTY) : PIRATE SKELETON
   They all need to be COMBAT PET Level 50. So you have to prepare 5 shard at least., You have these 4 pet, and you will breeze to RB2 easliy. BUT, you need one more thing
   
5. RUNE and SKILL,
   The only rune that will make difference is ASTAYI. Which will make your Skill to be AOE, before map 400, ASTAYI 2 is fine. but after map 400, your ASTAYI NEED TO BE ASTAYI 3.
   ••• THE MOST COMMON SKILL SETUP •••
   • FROST STRIKE (AOE)
   • BERSERK
   • CHARGED ATTACK WITH ASTAYI 3
   • BASH (AOE)
   ---- up to you, usuale triple attack or pierce if you have it.
   Why CHARGED ATTACK? because there is SP LIMITATION and TIME. so imagine every charged attack you will deal 800k-1.2m damage. in 2 cycle usally the 2 minion will be dead, 1 or 2 more the boss will be dead.
   If the boss skill is Cure/charged attack, maybe you will need to adjust your pet skill to do raid away in 2nd slot. Cure heals around charged attack damage so he wont die. Charged attacked sometimes deal damage when your pet def up buff is expired and you wil die,
   YOUR PET SKILL WILL BE
   • STRENGTEN
   • RESTORE
   • PROTECTION
   • CURE
   this skill set to ensure your pet will alive.
   
6. MVP shard is very important. keep in mind you will need
   • 5mvp shard to evolve 30-60
   • 20 mvp shard to evolve 60-90
   • 50 mvp shard to evolve 90-120
   • 140 shard to evolve 120-150
   so your MVP pet need to have 75 shard to be able to max level in RB2 and RB3.
   SO DO YOUR BLODDY EXPLORATION WITH DOUBLE REWARD.
   

Keep in mind in RB 3 YOU WILL HAVE 1 MORE COMBAT PET. SO YOU NEED ANOTHER 75 SHARD FOR ANOTHER MVP.
75 SHARD / 2 PER 20 HOURS Meaning 760 hours or 32 days... a month....
you are very lucky if your mvp has EFFICIENCY FIRST or RAPID WALKER. You can gamble a little by polishing. It is your choice.

Last thing
There is some post asking if they should stay in RB1. In my opinion, if you have 1 decent combat pet as tank, and have 4 pet which needed as combat skill above. Go do you RB2. Why?

1. You can do Bloody exploration. Like i said. You will need a lot of MVP shard.
   
2. You combat pet need exp. Which can only obtained by 3 combat pet at a time. It fast to reach 50 but hard from 60 above. It is a bit slow.
   

This is my opinion.
I think that is all. Sorry if my sharing is not perfect or have some flaws. but i hope it can help.
Have Fun PLaying.