I play all demigods alike, but I'll show you my new Oak strat. To be fair I was actually impressed by his general power: I never buyed artifacts or expensive items, but I stilll owned and was only killed once. Most of my kills were my minion's. Also din't use Last Stand.
-Buy Monks with starting gold and take penitence.
Monks are very usefull: their walking potions and they can heal allies too; golden.
Penitence is vital in teamplay, better than 3 spirits. Shield can be bought too though.
-Stay behind a melee assasin(Rook or UB) or play with Reg.
-Push, fall back, use monks to heal. Repeat. By this time my enemy mounted a triple push, pushed me and my Rook back.
-Get siege archers if your winning, get mino's if its even or your losing. If you can afford it: a universal gadget is very handy to finish off assasins. One neutral portal was capped so I tried to take it back. A enemy Rook saw me and charged in, I replied by running circles around him penticing him and letting my minions finsih him off. Use shield if needed.
-Push with portal reinforcements and get siege archers to destroy the towers. Get a flag cap and hp armor. I slowly pushed into the enemy base killing towers and killing DG's with help of a friendly Rook.
-When you can push to their portal, do it. Cap it, and use your flag lock to frustrate them even more. By this time the enemy DG's probably found out what your doing, so flee.
-Heal up with monks and push again. Your strong enough to kill an Assasin in the open, don't be afraid to attack. Always remeber to resummon, including in battle. Fall back and wear the assasin out. Take Surge of Faith.
-You now should have enough money to buy some more items: buy lvl 4 mino's and hp armor.
Stay on the outer most lane(on levathian) on the right, where you have the neutral portal capped. Harras enemy forces that are trying to make it to your base. If your winning push some more using siege archers. Assasin will probably try to get you, use shield and penitence and let your minions finish him off. Your lvl 4 Mino's are lethal to a lonely assasin. Be wary of double pushes though: they will stun and nuke you.
-Get more minions and max out in some good items. Contiune.
-You'll probably see that the power of your minions is diminishing: try to use your gold in Citadel upgrades. This will hopefully win you the game, as long as you have the neutral portals capped.