Uhh this is what I think about the classes.
Sinx : Sinx's have a big HP multiplier, so they have a wide spectrum of HP. It can go from a low of 200k high hitters, or a stable 340k low damage, survival players. They can switch between one or two daggers, for offense and defense versatility. If they see they aren't doing too much damage, they may assume the opponent is not wearing a GTB and slap an edge in that second hand. Their assumption may be right, and the opponent may end up on the ground. If they're being attacked by a sniper, they can slap on that second dagger, EDP, and just use poison react. Sniper takes about 20k damage each hit, poison react has what, 6 hits? 120k damage right there. If a sinx gets caught in a tight situation, he can use backslide and get on out of it. They come with their own element, so they don't have to buy anything else, but are also open to elemental reduction since they're usually assumed to have poison on.
LK : Average geared LK can deal about 20k to 40k tops. Have about 250k-300k+ HP. They have ranged capabilities, can slow down, weaken, and stun lock their opponent. They can escape dangerous situations with speed due to their pecos and can use Endure. They can switch from deadly damage, to a very fast acting Coma; but they must also give up their defense to do so. With their spear, they can make it possible for their opponent to not even touch them before they kiss the ground.
Champs : Average asura is about 200k to a high ending 330k without any buffs. They have about 170k HP to about 220k. Can buff themselves with AGI and Blessing. If ever in a dangerous situation, they can snap out of a situation or even root their opponent. With the new update, champs can go from TSS, then root their opponent, to full asura, root then switch back to minimize damage. TSS does on average about 6k per hit; totaling up to 30k per spam and as players have seen, many champs are good at spamming. If their opponent doesn't have FCP, they can break their handy dandy armor and defeat them with one asura. If they find out their opponent is wearing OLs, they can lessen their damage by taking gear off and further defeating said opponent.
Paladins : These tanks can have a wide spectrum of hp; from a low of about 300k to a high of about 450k. If they're fighting classes that require spamming a skill, they can Gloria Domini them and relinquish all of their SP, requiring the opponent to use more berries. If they're fighting a high damage class, like oh say a sinx or LK, they can reflect massive damage. Although doing this, one slip up can cost the Paladin's life. They can majorly reduce the damage of ranged attacks by using defending aura, but they lose their speed and become sitting ducks to being dispelled, stripped, and/or comad if they're not properly prepared. If their opponent isn't FCP'd, they can break their armor and Sacrifice them with heavy damage. Same thing can happen if their opponent doesn't wear GR. If the paladin is ever to become stripped, they can Gospel and put back on their armor. If faced with a close range enemy, the paladin can gospel the opponent and get the advantage.
I just listed about everything about the classes that you guys picked out (besides creator).
For sinx, the only problem I see with them is that their HP might be too high. They WERE made to be assassins though, and what do assassins do? They were made to kill their opponent; and fast.
I'm not too sure on what to suggest for the other classes.
