HI! I'm fairly new around here. I've had demigod for a long time, but I've mostly played alone against computers, over lan with a friend against computers, or occasionally 1v1 with that friend. I was never very serious, but recently I've discovered that online play is awesome, and that Sedna is the demigod for me. So, I've been playing around and reading everything I can find on here and I've managed to reach a point where I'm at least good enough to enjoy online games and not be so daunted by all the godly players out there. I wanted to start posting so I thought I would talk about my game with Sedna and maybe get some pointers and tips from the pros out there.
When I first found I loved Sedna I used her with a very offensive Pounce/heal speed set, made to smite other demigods with constant pouncing/healing and superior speed. It worked well at first, but against better players the set quickly lost the ability to beat out other demigods as they got tougher and stronger.
At one point I got owned by a minion Erebus build, who easily took my HP down in seconds. Thinking that I should try using Sedna as a true general as well, I tried some Yeti builds. I quickly discovered that Yetis are almost completely useless.
At this point I came to the forums and started reading up. Reading various guides and testing them in single player I learned a lot of things, such as how awesome priests are (something I never got before), how awesome counter healing is (a skill I once thought useless), how to share a priest with the other lane, how useful a 45 second cap lock can be, new builds for Sedna, and most importantly I was able to leave behind the pure smite based mentality I used to have and realize that there are more things to be doing than trying to kill every demigod I see. Just overnight I was able to go from a complete (and obvious) noob to being able to appear someone competent, despite having no real experience.
So, on to the build I'm using. I've come to settle on a speed/healing build, after reading the guide for the pure healer. The first 8 levels go entirely towards the healing skills, and I don't get pounce at all until level 9, or sometimes 10 if enemy priests have already come out in which case I prioritize counter healing. At the beginning of the game I grab boots of speed and the swift anklet, and with these and later inner grace levels I'm generally set for speed for the rest of the game. After that I go around capping flags and hitting one or two creep waves, largely avoiding confrontation, until my gold hits 900 at which point I head back for priests. My skill selection generally goes Heal > Inner Grace > Healing Wind > Heal II > Healing Wind II > Inner Grace II > Heal III > Inner Grace III, etc.
As for items, after the speed boots at the beginning and the monks shortly after, I'll save up for Vlemish. I find that in the very early game, most demigods have trouble damaging Sedna with monk support, and I rarely have to use heal so mana isnt too much of a problem. After, that, I collect armor and Plenor as needed. I used to go for the +hp +regen armors to get the highest possible HP regeneration, but I've started going for the +hp +armor ones instead. I havent played enough to claim to have seen a difference and I havent done the math but I think that with Sedna's already massive natural regeneration, damage mitigation should make that regeneration much more effective in a firefight than simply boosting it a little bit.
As for play style, I've learned to bring out the supporter in her. Using her speed to run around capping unguarded flags is nice, but the main goal is to hold lanes. I can't really damage other demigods, but they just can't push me off the lane either. Occasionally I will get a kill just with auto-attack, which I can often pull off in the early game since the tanking focus lets her run past towers very early when a lot of players are still expecting those towers to afford them an easy escape, and no one can outrun me this early. But for the most part, the goal is holding lanes, controlling flags, pushing lanes when no one is pushing back, and especially helping teammates push lanes far beyond their normal limits with my awesome healing powers. Unfortunately, I get pounce so late that it is only really effective for a few minutes before everyone is just too tough, but it is still an effective tool for forcing other people to retreat before they out-DPS my healing and at least adding some damage while supporting a teammate against other demigods. At this point, though, the thing I use pounce for the most is for large chunks of hit and run damage on towers and forts while trying to push a lane that an enemy demigod is defending.
Sorry for the massive amount of text, but yea. There's my favorite build and strategy for Sedna, so you pros can tell me how much it sucks or what I should consider doing otherwise. I suppose I could try other favor items like blood of the fallen, but I love how swift anklet with boots of speed will usually carry me through a whole game, and I haven't had trouble with my tanking yet. I don't think I've actually been killed yet so far, at least not while holding a lane. I have gone down once or twice by overextending into too many towers too early to get a kill, but that's just me being stupid. Comments, suggestions, etc.