Not only rarity, nymphs are exellent and are hyper rare.
Yeah, I for one have lost the final of a tournament because I had not 5 or 6 copies of a nymph specifies, they are not essential, but promote much advantage, I think it is because they provide benefits for veteran players and veteran players have influence on the forum. actually nymphs are more unfair than shards, the issue of hyper rarity.
In case of war are few players on the team that have various nymphs, then it is difficult to see abuse, but we can see what can happen when we see the team air in this war.
Marks not have a absurd advantage, but a little advantage.
However I'm not trying to banish nymphs pvps forum, actually I am in favor of using more shards and nymphs here, though I have disadvantages with nymphs.
Maybe interesting do a voting for nymphs, but put the option "use but with limitation" would be fair.