Which level 1 creature is better?

As usual, I'll describe each unit; if something isn't quite right, please don't be too harsh, as it's just my opinion. - Halberdier - a fairly powerful and sturdy unit, but not very fast. In the hands of a knight, it can become a dangerous enemy. - Gremlin - its main advantage is that it's a ranged unit. But its health leaves much to be desired, so it's easily defeated. Although its growth rate is quite decent, so it compensates with numbers. - Imp - fast, steals mana, but as weak as a gremlin... Therefore, it doesn't bother a mage hero for very long, unless there are 10,000 of them. - Centaur - my favorite, and not just because it's from Bastion. Its downside is its weak defense and large size. But it's a fast unit with very good damage and decent health. Although it's quite expensive. - Troglodyte - a rather average unit, but it can still cause some trouble... and you can't blind it. - Gnoll - also an average unit compared to centaurs, but it has decent defense. And it's slow. But it's so cute... - Goblin - an average unit, with good growth and speed. In my opinion, it doesn't have any special features. - Skeleton - good attack and defense stats, not very fast, but their number with a necromancer hero on XL maps is very impressive... So it's better to defeat them while there are few of them. - Fairy - weak, cheap, but there are many of them, they fly fast and attack without being attacked, pesky things. I remember once, just for fun, I gathered about 1000 of them, which was easy even with just one Conflux castle, and then they defeated many enemies. My favorites are, of course, centaurs, but in skilled hands (not mine), any troglodyte can cause trouble for anyone