Brain worms would need an experience reduction to appear early as they are non-threats for the majority of characters yet give a large amount of exp. (I would place current brain worms as the best possible find for an xl 1 Lugonite CK in the starting abyss.)

If you have any silver sling bullets, they do double damage against orbs of fire and ancient liches, two of the biggest threats on zot:5.

70 - (Piety/25) - (Invo skill * 4) is the failure rate of the invocation itself. Failing this check means the ability is not used. If random2(20 + you.skills[SK_INVOCATIONS] * 3) > 3, the summon is friendly. Lesser and greater servants both use the same friendliness check so lesser is not more likel...

The ttyrecs can be found at http://crawl.akrasiac.org/rawdata/ for CAO games and http://crawl.develz.org/ttyrecs/ for CDO games. The easiest way to figure out which ttyrecs belong to a specific game is to use the bots in ##crawl.