Soulkeep towers even those with small mana have a special feature that you may not found in other cards and in this points you have to try every tower and you have to find which tower is the best for only those group of fiends as it may not be effective against other ones so trying is your weapon to find best tower for the wave that your are defending against.
You may find that a tower with a low feature is very good for some fiends and a heavy tower can not even attack any fiend that are in the field and the best example is flying targets that you have to play with some towers to be able to attack them.
Knife Trosser is one of towers that are light but have some good features that you may benefit from as it has a range of 235 and with a fire interval of 0.7 and with a physical damage of 60 and from these words you could discover its best features.
Reasonable range with a great speed that making this tower of of best towers to use against those low HP fiends and what is more amazing is that this tower is so cheap and can be used with only 55 mana.
