It is from the dev blog in Korean here, seems they implemented several add-ons as game features. My onmyoji skills broke, and teleport warp UI broke. Game crashed often too. Had to uninstall most add-ons. Recently a notice was posted and urged players to stop using toukibi add-ons (tooltip helpers) (causes game crashes) on ktos.
There are several more bugs at the moment, such as hackapel dash not working again.
Rangee Po uses this build: skill planner here for PvP reitiari. I think picking either reitiari2(armour break, revive) or murmillo2(haste buff, shield train) will be better. I have not seen a lot of mur1-reitiari1 at PvP yet.
KTOS did receive 1 rank reset when new classes were released. It was an event. I cannot know about this event on itos.
@flyawaychen yes, a ktos patch turned matador costume quest into easy quest. Most have a cape now. Another patch added special costumes in TP shop for all new rank 8 classes (white bulletmarket costume, dark matador costume, special reitiari, onmyoji, zealot, shadowmancer costumes). Refer to ktos thread post by qq to view the costumes here
@leonardo.lmfl yes, class pages are down, that’s right. 
I have seen krivis3 sadhu3 inquis1 (flame attribute) based builds do well. example video at challenge mode solo
Melstis to extend transmit prana on yourself and on ally. Daino buffed attacks apply transmit prana damage boost. Inquis flames apply daino buffed prana attacks. This build is similar to the meta aa cleric build, but includes crowd control for party play (sadhu possession). AA damage of this build is lower than the meta aa cleric build (priest3 chaplain krivis3 inquis1). Even if you dislike auto-attacks, you could use possession to kill mobs. It will still spawn inquis flames, and flames still use daino-prana buffed damage. Krivis3 - sadhu3 - inquis1 - free rank (cleric2 for support, pd for healing factor solo are examples). On ktos parties bring kabba3 full support as healer. It is not necessary to have 2 clerics with high healing ability. This is why krivis3 monk3 zealot2 is also a popular build on ktos, but I rarely see this build on itos.
Note: this is an old vid, and malleus maleficarum no longer debuffs on bosses, so boss performance will be a bit lower nowadays (on ktos).
KTOS vs KTEST
Currently the KTOS is up-to-date with ktest, so no differences. Latest patch introduced the resource rumble RvR mode mentioned in this earlier post, with vids
04/19 KTOS patch (already implemented)
New trans values applied to ktos live server. 50% less blessed gems needed for each trans stage, each trans stage nerfed by 50%.
Blessed shard and item extraction system deleted, and all magic rod and hammer items deleted. No longer possible to extract shards or item. Trans items may be marketed or put into team storage now (no longer character bound).
Saalus convent nerf applied for 3+ characters. Below 3 characters you still receive full shards. (Refer to it on itos dev blog).
Hunting grounds chance for blessed shard drops increases x3.
Elite mobs have a 10% chance to drop 2 blessed shards. They won’t drop if you are 31 levels below or higher than the mob level.
Trans investments reimbursed to players
Payment in Goddess Blessed Gems.
Check market retrieve tab.
All equipment potential is increased by +1 (when possible, it is not possible to increase +1 potential if your equip was already at full potential).
Dragon raid equipment is excluded from the potential boost.
Alchemist briquetting skills and attribute deleted. Will be added to NPC.
Token benefits changed:
+2 dance emotes for token users.
+50% exp gain for token users.
+30 team storage slots for token users.
The ’ +1 additional entry’ effect of tokens is removed. It is now free for all players. (applies to: earthtower entry, raid entry, instanced dungeons)
The -2 cost of raid stones to enter First Raid is removed from tokens, now free for all players
Market tax changes for sellers:
1 day tax = 0.5%
3 days tax = 0.75%
5 days tax = 1.0%
(NEW option)14 days tax = 1.25%
Silver limit increased
Market and character inventory new limit: 10 billion (10’000’000’000) edit: should be 1 bil
Team storage limit: 20 billion (20’000’000’000) edit: should be 2 bil
Market registration limit: 10 billion edit: 1 bil
Note: This is 10 billion right? Or 10 thousand million?
Some guild advertisement changes (did not read it since I am without a guild)
Start of Anvil/Trans/Looting events
Trans event:
TP rewarded to your character if you successfully trans equipment of level 350.
50% less needed to trans.
Anvil event:
Receive special anvil boxes from mail, use it to anvil.
50% less silver cost when using anvils.
Looting event:
+1000 looting chance during weekends for all characters.
Goddess Blessed Gem exchange shop event
Shop opened to exchange your blessed gems for items:
-silver box video here
-diamond anvils
-stat reset potion
-rank reset voucher
-some more items (hair costume boxes, attribute vouchers, and such items)
Mysterious Thief event started
BONG video here
Basically an event to dodge mobs and get to a treasure chest.
edit: added pastebin link with this patch info on first post.
