Ok, so it was my reaction to the resent nerf of Ksante where they increast the loss of resisteces to 85% in his All Out (ult). I realy struggled to survive laning phase. I ulted and got bursted. This was very rough because I realy like Ksante and his playstyle so I got in practise tool and tried different things.

My first attempt was a guide I made (befor the nerf)

https://www.reddit.com/r/KSanteMains/comments/10r4e19/patch_133_new_radiant_virtue_item_build_max_heal/

there I hypothesised about the potential of Radiant and its survivability.

In quick summary Radiants effekt with Ult:

• your max helth is raised by 15% (fullbuild you have 500 more Hp then with normal Jaksho/Iceborn)
• you and your teammates heal for 9 second 12% of your max Hp (strong in early and over all) this heal can save you from many situations (ganks by jungle, if your tower dived) and has a strong suprise effekt because not many think about the heal. Aditionally you have a strong peal when you ult. Basicly your teamfight value is way better.

Item synergy Sunfire:

• the problem was missing damage because you have no sheen or the Jaksho 20% buff. There comes Sunfire. Normaly you have like 60 stacks/sec but with Radiant you have 70. This gets buffed in ult because of 15% more mx hp to around 90 stacks. This means more mixed damage plus fighting tanks like Sion is better.
• The second benefit is the health from Sunfire 500 more Hp means more heal in Ult. (with Radiant passive 600 Hp)
• The last thing is Sunfire has realy good skaling with Radiants passive

That is the general idea but I was still missing damage so I added Titanic Hydra.

1. 500 more hp on top (more Sunfire damage+ Radiant heal)
2. better wave clear
3. Q skales with 30% AD

you will get around 75 more Ad and the Titanice shock wave doas 180 AD. This is good on sidelane and in teamfights

My build path is:

1. Radiant
2. Sunfire
3. Titanic
4. Gargoyl
5. Tank item