so wait, i should use my stones on the batman REM instead of the godfest?
well it depends on what you want,2 of the batman monster have delays in color that usualy don't have delays which is incredibly usefull (the reason everybody says "echidna this,echidna that" is because echidna has delay) coincidentaly one introduce delay to the amazing world of light (the dark/light batman) so you probably would want one of those
the godfest feature archdemon,they are lame monster that have allright stat,a dark sub element and a skills that deal 3x the damage you receive for 5 turns,they aren't really something to get excited about except for one who gives every devil 2x hp and 2x rcv (the green one - astaroth) which can work as a sort of proto-lucifer
the other thing featured in this godfest is a new set of god which doesn't really follow a theme... they are as following
fire - ame no uzume:
leader : fire monster get 3.5x atk when your hp is above 80%
active : rcv increase by 1.5x for 3 turns
the leader is hard to use,the active is junk,bad!
water/wood - umi&yama:
leader : atk x5 when water/wood/light/dark attack all at once
active: fire orbs become water orb,heart orbs become wood orbs
this is like kirin so it's actualy good but less strong than kirin because kirin come with gravity instead,also since he doesn't like red,that means no echidna unless you purposely waste a slot on her or no delay otherwise... if only there was a dark/light monster with delay...
wood - kushinada:
leader : atk increase by 1.5x after 3 combo,then it increase by 0.5x for each combo other than that (so a 7 combo give you 3.5x atk,and an hypotetical 20x combo give you 10x)
active : reduce damage by 75% for 1 turn
can get pretty high but you either need high luck or skills,the newly upgraded bastet does the same so i don't really need it,the reduction is nice i guess?
light - izanami:
leader : god monster get 3.5x atk when your hp is above 80%
active : all god monster get x2 atk for 1 turn
like ame-no-uzume the leader is hard to use,and of course making an all god team is pretty fucking hard since that means a team made mostly of REM monster (with the exception of verche) boost skill are always good and he's the only one that boost god's anyway
dark - ookunikushi:
leader : atk x4 when combo reaches 6+
active : delay all monster for 1 turn
like kushinada,it takes less combo to trigger but if you don't reach the threshold you get nothing,once again if you have bastet then you can use her instead,the delay is usefull but small
robin from the batman rem also come's with a similiar skill to kushinada but his threshold is pretty fucking high (8 combo for 4x damage,9 combo for 6x damage and 10 combo for 8x damage) so i'm not sure he's worth over kushinada...
so tl;dr - the fire one is awfull,the wood and dark one can buy you an extra turn and can hit extra hard if you are good at combo's,the blue one is like kirin and the light one is sort of a luxury god so is it worth rolling? well nobody of us has experience with the new set of gods so it's hard to gauge them properly but the arch demon aren't that good so only half of the godfest is worth it and you aren't 100% sure that you are going to get a god... if the batman rem has only those 5 monster above and they all drop equaly then trying to get one of the "delays" batman might be a better investment