Spellsinger OR Elemental Summoner

[Ingwaz]

I just started playing and i need some help from experienced players deciding on my main char choice. Im between Spellsinger or Elemental Summoner. Would have just gone with necro but its too expensive to sustain  in this server

How do they compare in PvP/PvE solo and in party?
Is the ES more expensive to sustain due to beast soulshots/spirit ores?
Does the SPS have a mana problem and is that solved with an Elder recharging?
Does the ES have any dd skills in classic or relies solely on Unicorns?

Also, what do u think is more enjoyable to play in the long run?

Any other thoughts/suggestions?
Thanks.