What to roll on?

Babylonia's banner is a good one to roll on. Caster Gilgamesh is a very helpful servant if you can manage to get him.

Wait for Salomon at the end of the year and get the best support servant in the game, Merlin

why not? enkidu, medusa and gil is very good servant. you wont disapointed and for beginer you need to colect many servant.
what about merlin? he is single banner, the posiblities you will get him realy low and the posibilities for you to get 4* servant that you dont need or weak prety high.
if you roll for salomon, even if you dont get enkidu there is still high chance for you to get gil or medusa lily

Enkidu, Quetz..... are all good in their classes.
Gil, top SR support
Medusa, great against male and you can pair with sisters.

Merlin is great, but doesnt mean others are not worth rolling