Basic questions about EB multiplayer

[The Celtic Viking]

Yeah, I was wrong about that. Still you can rely on them to win, or at least do very well, against most units of comparable cost. I wouldn't have the sig I do if they did not. :p

Another question - when using Hoplites that have swords as secondary weapons - should i always use this swords when i engage them with infantery?

Yes.

Same with cavalry - is it better to take the secondary sword weapon against cavalry or the spear ? I guess the spear.

Yes, the spear is better vs. cavalry than the sword. The (long)sword might be better at killing low-defence cavalry (though I can't confirm that), but the spear is still better at keeping the unit alive itself and better vs. medium-higher defence cavalry.

Im presuming that the secondary weapon is no AP.

Not on any hoplite, no.