Oi,
1. If you play ES, you don't even need a bow - summoners get invited into raid parties automatically because their main purpose in the raids is healing (since you get virtually infinite mana from your summon)
2. Spoils obviously get some extra adena, but they aren't the "dirty rich" chars anymore like on older chronicles... And even then, the spoil money start becoming noticeable after level 60, which even when leveled up through raids takes quite some time. If you're going to play ES, you don't even need adena that much.
3. ES are extremelly demanded in raid parties all the way to 60+, often gets invited into 60+ AoE parties as well. At high levels they're very strong as well, CPs often have 2-3 Elemental Summoners in their line ups.
4. There're definitely more people here than on EU offic, but obviously less people than NA classic - the population dropped a bit when NCwest was opened, but it's not too noticeable and it's expected that people will slowly start coming back here once the NCwest's hype starts dying. It's also expected that we'll get patch 2.5 ""soon"", which should bump up the population as well. But generally speaking, the server is online for around 3 years and the online hasn't changed much since the server start - we don't have exact numbers, but it usually ranges from 1k to 2k with obvious spikes during castle sieges for example